What is homeostasis?
The state of relative stability of the body’s internal environment.
What are feedback systems?
Corrective cycles that help restore conditions needed for health and life.
What is anatomy?
The science of body structures and their relationships.
What is physiology?
The science of body functions—how body parts work.
What is embryology?
The study of the first eight weeks of development after fertilization.
What is developmental biology?
The complete development of an individual from fertilization to death.
What is cell biology?
The study of cellular structure and functions.
What is histology?
The microscopic structure of tissues.
What is gross anatomy?
Structures that can be examined without a microscope.
What is systemic anatomy?
Structure of specific systems of the body, like nervous or respiratory systems.
What is regional anatomy?
Specific regions of the body, such as the head or chest.
What is surface anatomy?
Surface markings of the body to understand internal anatomy.
What is imaging anatomy?
Internal body structures visualized with techniques like x-rays and MRI.
What is pathological anatomy?
Structural changes associated with disease.
What is molecular physiology?
Functions of individual molecules like proteins and DNA.
What is neurophysiology?
Functional properties of nerve cells.
What is endocrinology?
Study of hormones and how they control body functions.
What is cardiovascular physiology?
Functions of the heart and blood vessels.
What is immunology?
The body’s defenses against disease-causing agents.
What is respiratory physiology?
Functions of the air passageways and lungs.
What is renal physiology?
Functions of the kidneys.
What is exercise physiology?
Changes in cell and organ functions due to muscular activity.
What is pathophysiology?
Functional changes associated with disease and aging.
What is the relationship between structure and function in the body?
The structure of a body part often reflects its function.
What protects the brain?
The tightly joined bones of the skull.
What allows movement in fingers?
Loosely joined bones.
What facilitates oxygen transfer in lungs?
Thin walls of air sacs.
What might a respiratory therapist improve?
Respiratory function.
What are the six levels of structural organization in the body?
Chemical, cellular, tissue, organ, system, organismal.
What is the chemical level?
Basic level including atoms and molecules.
What are essential atoms for life?
C, H, O, N, P, Ca, S.
What is DNA?
Genetic material passed between generations.
What is glucose commonly known as?
Blood sugar.
What is the cellular level?
Molecules form cells, the basic units of life.
What are examples of cell types?
Muscle cells, nerve cells, epithelial cells.
What is the tissue level?
Groups of cells working together for a function.
What are the four basic types of tissues?
Epithelial, connective, muscular, nervous.
What does epithelial tissue do?
Covers surfaces, lines organs, forms glands.
What is the function of connective tissue?
Connects, supports, protects organs.
What does muscular tissue do?
Contracts to move parts and generate heat.
What does nervous tissue do?
Carries information through nerve impulses.
What is the organ level?
Structures composed of different tissue types.
What are examples of organs?
Stomach, skin, bones, heart, liver, lungs, brain.
What are organs made of?
Two or more different types of tissues.
What is an example of an organ?
Stomach, skin, bones, heart, liver, lungs, brain.
What type of tissue covers the stomach's outer layer?
Epithelial tissue and connective tissue.
What is the function of smooth muscle tissue in the stomach?
Contracts to churn and mix food.
What does the innermost lining of the stomach produce?
Fluid and chemicals for digestion.
What is the organ-system level?
Related organs with a common function.
What is an example of a system in the human body?
Digestive system.
What organs are part of the digestive system?
Mouth, salivary glands, pharynx, esophagus, stomach, small intestine, large intestine, liver, gallbladder, pancreas.
What is the organismal level?
Any living individual.
What does the integumentary system include?
Skin and associated structures.
What is a function of the integumentary system?
Protects body and regulates temperature.
What does the skeletal system consist of?
Bones and joints.
What is a function of the skeletal system?
Supports and protects the body.
What type of muscle is part of the muscular system?
Skeletal muscle tissue.
What is a function of the muscular system?
Participates in body movements.
What components are in the nervous system?
Brain, spinal cord, nerves, special sense organs.
What does the nervous system do?
Generates nerve impulses to regulate body activities.
What does the endocrine system consist of?
Hormone-producing glands and cells.
What is a function of the endocrine system?
Regulates body activities by releasing hormones.
What components are in the cardiovascular system?
Blood, heart, and blood vessels.
What is the function of the cardiovascular system?
Pumps blood and carries oxygen and nutrients to cells.
What does blood carry to cells?
Oxygen and nutrients
What does blood carry away from cells?
Carbon dioxide and wastes
What does blood help regulate?
Acid–base balance, temperature, and water content
What do blood components help defend against?
Disease
What are the components of the lymphatic system?
Lymphatic fluid, vessels, spleen, thymus, lymph nodes, tonsils
What cells carry out immune responses?
B cells and T cells
What is a function of the lymphatic system?
Returns proteins and fluid to blood
What does the respiratory system transfer from inhaled air to blood?
Oxygen
What does the respiratory system transfer from blood to exhaled air?
Carbon dioxide
What are the components of the digestive system?
Gastrointestinal tract and accessory organs
What is a function of the digestive system?
Breakdown of food and absorption of nutrients
What are the components of the urinary system?
Kidneys, ureters, urinary bladder, urethra
What is a function of the urinary system?
Produces, stores, and eliminates urine
What do gonads produce in the reproductive system?
Gametes (sperm or oocytes)
What hormones do gonads release?
Hormones that regulate reproduction
What are noninvasive diagnostic techniques?
Techniques that do not involve insertion through skin or body openings
What is inspection in diagnostic techniques?
Observing the body for changes
What is palpation?
Gently touching body surfaces
What is auscultation?
Listening to body sounds
What is percussion?
Tapping on body surface and listening to sounds
What is metabolism?
The sum of all chemical processes in the body.
What is catabolism?
The breakdown of complex substances into simpler components.
What is anabolism?
The building up of complex substances from simpler components.
What is responsiveness in living organisms?
The ability to detect and respond to changes.
What does movement include?
Motion of the whole body, organs, cells, and structures inside cells.
What is growth in biological terms?
An increase in body size from larger cells or more cells.
What is differentiation?
The development of a cell from unspecialized to specialized state.
What is reproduction in biology?
Formation of new cells for growth, repair, or replacement.
What are the basic life processes of the human body?
Metabolism, responsiveness, movement, growth, differentiation, reproduction.
What is the role of exercise physiologists?
Study the human body at various levels of organization.
Which body systems help eliminate wastes?
Refer to Table 1.2 for specific systems.
What stages does a human develop through?
Fetus, infant, child, adult
What does reproduction refer to?
Formation of new cells or production of a new individual
How does new cell formation occur?
Through cell division
What forms a zygote?
Fertilization of an ovum by a sperm cell
What indicates death in the human body?
Loss of heartbeat, absence of breathing, loss of brain functions
What is an autopsy?
Postmortem examination of the body
What can an autopsy reveal?
Diseases, extent of injuries, information about diseases
What is homeostasis?
Maintenance of stable internal conditions
What influences homeostasis?
Interplay of regulatory systems
What is intracellular fluid?
Fluid inside cells
What is extracellular fluid?
Fluid outside body cells
What is interstitial fluid?
ECF between cells of tissues
What is blood plasma?
ECF within blood vessels
What is lymph?
ECF within lymphatic vessels
What is cerebrospinal fluid?
ECF in and around the brain and spinal cord
What is synovial fluid?
ECF in joints
What is aqueous humor?
ECF in the eyes
What does proper cell functioning depend on?
Regulation of surrounding fluid composition
What surrounds the cells of the body?
Extracellular fluid
What is the external environment of the body?
Space surrounding the entire body
What surrounds the entire body?
The external environment.
What system covers the outer surface of the body?
Integumentary system.
What does the integumentary system protect?
The internal environment from damaging agents.
How does oxygen enter plasma?
Through the respiratory system.
How do nutrients enter plasma?
Through the digestive system.
What system transports substances throughout the body?
Cardiovascular system.
Where do oxygen and nutrients enter after plasma?
Interstitial fluid.
What are blood capillaries specialized for?
Transfer of material between plasma and interstitial fluid.
What do cells produce during metabolism?
Waste products.
How is CO2 removed from the body?
By the respiratory system.
How are nitrogen-containing wastes eliminated?
By the urinary system.
What refers to the extracellular fluid surrounding body cells?
Internal environment.
What can disturb homeostasis?
External and internal disruptions.
What is an example of an external disruption?
Intense heat or lack of oxygen.
What can cause internal disruptions?
Low blood glucose levels.
What systems regulate homeostasis?
Nervous and endocrine systems.
How does the nervous system regulate homeostasis?
By sending electrical signals (nerve impulses).
What do hormones do in the endocrine system?
Secrete messenger molecules into the blood.
What type of feedback systems regulate the internal environment?
Negative feedback systems.
What is a feedback system?
A cycle of monitoring and evaluating body conditions.
What are monitored variables in feedback systems?
Body temperature, blood pressure, blood glucose level.
What is a controlled condition?
A monitored variable such as body temperature, blood pressure, or blood glucose level.
What is a stimulus?
Any disruption that changes a controlled condition.
What are the three basic components of a feedback system?
Receptor, control center, and effector.
What is the function of a receptor?
Monitors changes in a controlled condition and sends input to a control center.
What is an afferent pathway?
The pathway where information flows toward the control center.
What does a control center do?
Sets the narrow or set point for a controlled condition and generates output commands.
What is an efferent pathway?
The pathway where information flows away from the control center.
What is an effector?
A body structure that receives output from the control center and produces a response.
What happens when body temperature drops?
The brain sends nerve impulses to skeletal muscles, causing shivering to generate heat.
What is the difference between negative and positive feedback systems?
Negative feedback reverses a change; positive feedback enhances it.
What is a negative feedback system?
A system that reverses a change in a controlled condition.
How does blood pressure regulation work?
Baroreceptors detect high BP, send input to the brain, which sends output to decrease heart rate and dilate blood vessels.
What restores homeostasis in blood pressure?
The decrease in heart rate and dilation of blood vessels after high BP is detected.
What symbolizes negative feedback?
A broken return arrow with a negative sign surrounded by a circle
What happens if the response reverses the stimulus?
The system operates by negative feedback
What happens to heart rate if blood pressure decreases?
Heart rate increases by negative feedback
What does a positive feedback system do?
Strengthens or reinforces a change in controlled conditions
How does a positive feedback system operate?
The response affects the controlled condition differently
What interrupts a positive feedback system?
Some mechanism
What is an example of a positive feedback system?
Normal childbirth
What do stretch-sensitive nerve cells monitor?
The stretching of the cervix
What hormone is released during childbirth?
Oxytocin
What happens during the cycle of childbirth?
Stretching, hormone release, and stronger contractions
What happens if the response enhances the stimulus?
The system operates by positive feedback
Why do positive feedback systems need termination mechanisms?
To prevent life-threatening conditions
What happens to heart cells during severe blood loss?
They receive less oxygen and function less efficiently
What can happen if blood loss continues?
It can lead to death without medical intervention
What is an important difference between positive and negative feedback?
Positive feedback reinforces change; negative feedback stabilizes conditions
What regulates conditions that remain stable over long periods?
Negative feedback systems
What is homeostasis?
A stable internal environment in the body
What gives the body healing power?
The ability to maintain homeostasis
What is homeostasis?
A condition where the body’s internal environment remains relatively stable.
What does homeostasis provide the body?
Tremendous healing power and resistance to abuse.
What factors influence health?
Environment, behavior, genetic makeup, air, food, and thoughts.
How can lifestyle affect homeostasis?
It can support or interfere with the body's ability to maintain homeostasis.
What can poor health behaviors lead to?
Diseases resulting from interference with homeostasis.
What is an example of a smoking-related illness?
Emphysema or lung cancer.
What is a disorder?
Any abnormality of structure or function.
What is a disease?
An illness characterized by a recognizable set of signs and symptoms.
What is a local disease?
A disease affecting one part or a limited region of the body.
What is a systemic disease?
A disease affecting the entire body or several parts of it.
What are symptoms?
Subjective changes in body functions not apparent to an observer.
What are signs of disease?
Objective changes that can be observed and measured.
What is epidemiology?
The science of why, when, and where diseases occur and how they are transmitted.
What does pharmacology study?
Effects and uses of drugs in the treatment of disease.
What is diagnosis?
The science and skill of distinguishing one disorder or disease from another.
What is involved in taking a medical history?
Collecting information about events related to a patient’s illness.
What techniques are used in a physical examination?
Inspection, palpation, auscultation, and percussion.
What is a physical examination?
An orderly evaluation of the body and its functions.
What techniques are included in a physical examination?
Inspection, palpation, auscultation, percussion.
What are vital signs?
Temperature, pulse, respiratory rate, blood pressure.
What is intracellular fluid?
Fluid within cells.
What is extracellular fluid?
Fluid outside cells, called internal environment.
What is interstitial fluid?
Fluid between cells in tissues.
What is blood plasma?
Liquid component of blood.
What initiates a feedback system?
Disturbances acting as stimuli.
Define receptor in a feedback system.
Detects changes in the environment.
Define control center in a feedback system.
Processes information and decides response.
Define effector in a feedback system.
Produces response to restore balance.
What is the difference between symptoms and signs?
Symptoms are subjective; signs are objective.
Give an example of a symptom.
Pain.
Give an example of a sign.
Fever.
What is the anatomical position?
Standing erect, facing observer, arms at sides, palms forward.
What does the trunk consist of?
Chest, abdomen, pelvis.
What are the major regions of the human body?
Head, neck, trunk, upper limbs, lower limbs.
What is the prone position?
Lying facedown.
What is the supine position?
Lying faceup.
What does the upper limb consist of?
Shoulder, armpit, arm, forearm, wrist, hand.
What does the lower limb consist of?
Buttock, thigh, leg, ankle, foot.
What is the groin?
Area where trunk attaches to thighs.
What is the anatomical term for the buttock?
Gluteal region
What is the anatomical term for armpit?
Axilla
What is the axillary nerve?
Nerve passing within the armpit
What does 'superior' mean in directional terms?
Toward the head or upper part
What does 'inferior' mean in directional terms?
Away from the head or lower part
What does 'anterior' mean in directional terms?
Nearer to the front of the body
What does 'posterior' mean in directional terms?
Nearer to the back of the body
What does 'medial' mean in directional terms?
Nearer to the midline
What does 'lateral' mean in directional terms?
Farther from the midline
What does 'intermediate' mean in directional terms?
Between two structures
What does 'ipsilateral' mean in directional terms?
On the same side of the body
What does 'contralateral' mean in directional terms?
On the opposite side of the body
What does 'proximal' mean in directional terms?
Nearer to the attachment of a limb
What does 'distal' mean in directional terms?
Farther from the attachment of a limb
What does 'superficial' mean in directional terms?
Toward or on the surface of the body
What does 'deep' mean in directional terms?
Away from the surface of the body
What do 'erior' and 'ventral' mean in humans?
They mean the same thing.
What does 'ventral' refer to in four-legged animals?
The belly side.
What does 'dorsal' refer to in four-legged animals?
The back side.
What is the relationship between the radius and the humerus?
The radius is not proximal to the humerus.
Is the esophagus anterior to the trachea?
Yes.
Are the ribs superficial to the lungs?
Yes.
Is the urinary bladder medial to the ascending colon?
Yes.
Is the sternum lateral to the descending colon?
No.
What divides the body into right and left sides?
Sagittal plane.
What is a midsagittal plane?
A sagittal plane that divides the body into equal sides.
What is a para sagittal plane?
A sagittal plane that divides the body into unequal sides.
What does a frontal plane divide?
It divides the body into anterior and posterior portions.
What does a transverse plane divide?
It divides the body into superior and inferior portions.
What angle does an oblique plane pass through the body?
Any angle other than 90 degrees.
Which plane divides the heart into anterior and posterior portions?
Frontal plane.
What is a section in anatomy?
A cut of the body or organ made along a plane.
What are body cavities?
Spaces that enclose internal organs.
What are the major cavities of the trunk?
Thoracic and abdominopelvic cavities.
Where is the urinary bladder located?
Pelvic cavity.
Where is the stomach located?
Abdominal cavity.
Where is the heart located?
Thoracic cavity.
Where is the small intestine located?
Abdominal cavity.
Where are the lungs located?
Thoracic cavity.
Where are the internal female reproductive organs located?
Pelvic cavity.
Where is the thymus located?
Thoracic cavity.
Where is the spleen located?
Abdominal cavity.
Where is the liver located?
Abdominal cavity.
What forms the cranial cavity?
Cranial bones
What does the vertebral column form?
Vertebral canal
What surrounds the brain and spinal cord?
Meninges and shock-absorbing fluid
What are the major body cavities of the trunk?
Thoracic and abdominopelvic cavities
What is the thoracic cavity formed by?
Ribs, chest muscles, sternum, vertebral column
What surrounds the heart?
Pericardial cavity
What are the cavities around the lungs called?
Pleural cavities
What is the central region of the thoracic cavity?
Mediastinum
What does the mediastinum contain?
Heart, esophagus, trachea, thymus, blood vessels
What separates the thoracic cavity from the abdominopelvic cavity?
Diaphragm
What does the abdominopelvic cavity extend from?
Diaphragm to the groin
What does the abdominal cavity contain?
Stomach, spleen, liver, gallbladder, intestines
What does the pelvic cavity contain?
Urinary bladder, large intestine, reproductive organs
What are the organs inside the thoracic and abdominopelvic cavities called?
Viscera
What is a serous membrane?
A double-layered membrane covering body cavities
What are the two layers of a serous membrane?
Parietal layer and visceral layer
What are the two layers of membranes?
Parietal layer and visceral layer
What does the parietal layer do?
Lines the walls of cavities
What does the visceral layer do?
Covers and adheres to the viscera
What is found between the parietal and visceral layers?
Potential space with lubricating fluid
What is the lubricating fluid called?
Serous fluid
What is the serous membrane of the pleural cavities called?
Pleura
What does the visceral pleura cover?
Surface of the lungs
What does the parietal pleura line?
Chest wall
What is the cavity between the pleura layers called?
Pleural cavity
What is the serous membrane of the pericardial cavity called?
Pericardium
What does the visceral pericardium cover?
Surface of the heart
What does the parietal pericardium line?
Chest wall
What is the cavity between the pericardium layers called?
Pericardial cavity
What is the serous membrane of the abdominal cavity called?
Peritoneum
What does the visceral peritoneum cover?
Abdominal viscera
What does the parietal peritoneum line?
Abdominal wall
What is the cavity between the peritoneum layers called?
Peritoneal cavity
What are retroperitoneal organs?
Organs located behind the peritoneum
Name some retroperitoneal organs.
Kidneys, adrenal glands, pancreas, duodenum
What is the oral cavity?
Contains the tongue and teeth
What does the nasal cavity contain?
Nose
What do the orbital cavities contain?
Eyeballs
What do the middle ear cavities contain?
Small bones
What do synovial cavities contain?
Synovial fluid
How is the abdominopelvic cavity divided?
Into nine regions or quadrants
What are the names of the nine abdominopelvic regions?
Right hypochondriac, epigastric, left hypochondriac, right lumbar, umbilical, left lumbar, right inguinal, hypogastric, left inguinal
What is the superior horizontal line in abdominopelvic division?
Subcostal line
What is the inferior horizontal line in abdominopelvic division?
Transtubercular line
What are the vertical lines in abdominopelvic division?
Left and right midclavicular lines
What regions are used for anatomical studies?
Nine-region designation
What designation is used to locate pain or tumors?
Quadrant designation
Which organ is mostly found in the right upper quadrant?
Most of the liver
Where is the ascending colon located?
Right lower quadrant
In which quadrant would pain from appendicitis be felt?
Right lower quadrant
What lines divide the abdominopelvic cavity into quadrants?
Midsagittal line and transverse line
What are the names of the four abdominopelvic quadrants?
RUQ, LUQ, RLQ, LLQ
What are observable changes associated with aging?
Wrinkled skin, gray hair, loss of bone mass
What happens to muscle mass with aging?
Decreased muscle mass and strength
What is a key effect of aging on the digestive system?
Less efficient functioning
What is medical imaging?
Techniques to create images of the human body
What is the grandparent of all medical imaging techniques?
Conventional radiography (x-rays)
What is a radiograph?
A two-dimensional image produced by x-rays
What do bones appear as in x-rays?
White
What do hollow structures like lungs appear as in x-rays?
Black
What do X-rays show for bones?
Bones appear white.
What do X-rays show for lungs?
Lungs appear black.
What do structures of intermediate density appear as?
Varying shades of gray.
What is mammography used for?
Examining soft tissues such as the breast.
What is DEXA scan used for?
Determining bone density.
What is a contrast medium used for?
To make hollow or fluid-filled structures visible.
How can contrast medium be introduced?
By injection, orally, or rectally.
What do contrast x-rays image?
Blood vessels, urinary system, gastrointestinal tract.
What does MRI stand for?
Magnetic Resonance Imaging.
What does MRI expose the body to?
A high-energy magnetic field.
What do protons do in MRI?
Arrange themselves in relation to the magnetic field.
What is the resulting image from MRI called?
A color-coded image on a video monitor.
What is MRI most useful for?
Differentiating normal and abnormal tissues.
What is CT scanning formerly called?
Computerized Axial Tomography (CAT) scanning.
What does a CT scan visualize?
Soft tissues and organs with much more detail.
What can multiple CT scans create?
Three-dimensional views of structures.
What is ultrasound scanning based on?
High-frequency sound waves.
What is the image produced by ultrasound called?
Sonogram.
What is the most common use of ultrasound?
Visualizing the fetus during pregnancy.
What does CCTA stand for?
Coronary Computed Tomography Angiography.
What type of medium is used in CCTA?
Iodine-containing contrast medium.
What is CCTA scan used for?
To determine coronary artery blockages.
What contrast medium is used in CCTA?
Iodine-containing contrast medium.
What is injected to decrease heart rate during CCTA?
A beta blocker.
How long does a CCTA scan take to generate an image?
Less than 20 seconds.
What type of images does CCTA produce?
Three-dimensional images of coronary blood vessels.
What does a PET scan use to create images?
A substance that emits positrons.
What do gamma rays in a PET scan indicate?
Where the injected substance is being used in the body.
What colors indicate minimal activity in a PET scan?
Black and blue.
What is endoscopy used for?
Visual examination of body organs or cavities.
What instrument is used in endoscopy?
An endoscope.
What is colonoscopy used to examine?
The interior of the colon.
What is introduced in radionuclide scanning?
A radionuclide (radioactive substance).
What does SPECT stand for?
Single-photon-emission computed tomography.
What does radionuclide scanning study?
Activity of a tissue or organ.
What do intense colors in radionuclide images indicate?
High tissue activity.
What condition can be studied with SPECT scanning?
Migraine attacks.
What does the green area in the brain indicate?
Migraine attack
Where is the Dept. of Nuclear Medicine located?
Charing Cross Hospital
What are feedback systems?
Corrective cycles that help restore conditions needed for health and life.
What is developmental biology?
The complete development of an individual from fertilization to death.
What is systemic anatomy?
Structure of specific systems of the body, like nervous or respiratory systems.
What is the relationship between structure and function in the body?
The structure of a body part often reflects its function.
What are the six levels of structural organization in the body?
Chemical, cellular, tissue, organ, system, organismal.
What organs are part of the digestive system?
Mouth, salivary glands, pharynx, esophagus, stomach, small intestine, large intestine, liver, gallbladder, pancreas.
What is the function of the cardiovascular system?
Pumps blood and carries oxygen and nutrients to cells.
What are the components of the lymphatic system?
Lymphatic fluid, vessels, spleen, thymus, lymph nodes, tonsils
What are noninvasive diagnostic techniques?
Techniques that do not involve insertion through skin or body openings
What are the basic life processes of the human body?
Metabolism, responsiveness, movement, growth, differentiation, reproduction.
What indicates death in the human body?
Loss of heartbeat, absence of breathing, loss of brain functions
What are blood capillaries specialized for?
Transfer of material between plasma and interstitial fluid.
What are monitored variables in feedback systems?
Body temperature, blood pressure, blood glucose level.
What is a controlled condition?
A monitored variable such as body temperature, blood pressure, or blood glucose level.
What is the function of a receptor?
Monitors changes in a controlled condition and sends input to a control center.
What does a control center do?
Sets the narrow or set point for a controlled condition and generates output commands.
What is an effector?
A body structure that receives output from the control center and produces a response.
What happens when body temperature drops?
The brain sends nerve impulses to skeletal muscles, causing shivering to generate heat.
What is the difference between negative and positive feedback systems?
Negative feedback reverses a change; positive feedback enhances it.
How does blood pressure regulation work?
Baroreceptors detect high BP, send input to the brain, which sends output to decrease heart rate and dilate blood vessels.
What restores homeostasis in blood pressure?
The decrease in heart rate and dilation of blood vessels after high BP is detected.
What symbolizes negative feedback?
A broken return arrow with a negative sign surrounded by a circle
What does a positive feedback system do?
Strengthens or reinforces a change in controlled conditions
How does a positive feedback system operate?
The response affects the controlled condition differently
Why do positive feedback systems need termination mechanisms?
To prevent life-threatening conditions
What happens to heart cells during severe blood loss?
They receive less oxygen and function less efficiently
What is an important difference between positive and negative feedback?
Positive feedback reinforces change; negative feedback stabilizes conditions
How can lifestyle affect homeostasis?
It can support or interfere with the body's ability to maintain homeostasis.
What is epidemiology?
The science of why, when, and where diseases occur and how they are transmitted.
What is involved in taking a medical history?
Collecting information about events related to a patient’s illness.
What techniques are used in a physical examination?
Inspection, palpation, auscultation, and percussion.
What techniques are included in a physical examination?
Inspection, palpation, auscultation, percussion.
What is the relationship between the radius and the humerus?
The radius is not proximal to the humerus.
What are the names of the nine abdominopelvic regions?
Right hypochondriac, epigastric, left hypochondriac, right lumbar, umbilical, left lumbar, right inguinal, hypogastric, left inguinal
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