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What are the two main systems involved in coordination in animals?
What does the nervous system in animals consist of?
What are the components of the Central Nervous System?
How many pairs of cranial nerves are there in the Peripheral Nervous System?
How many pairs of spinal nerves are present in the Peripheral Nervous System?
What is the primary function of the nerve cells (neurons)?
What are the two main types of neurons?
What role do sensory receptors play in the nervous system?
Which system in animals is associated with hormones?
What is the function of plant hormones?
What type of movements are exhibited in plants?
What are auxin and gibberellin related to?
What diagrams are used to illustrate the human nervous system?
What does the endocrine system involve?
Provide a visual representation of the endocrine system.
What are the main movements associated with plants?
What is a stimulus?
Define receptors.
What is an effector?
What is a response?
List the basic sensory receptors in humans.
What sense organ do photoreceptors belong to?
What stimuli do olfactory receptors respond to?
What stimuli do gustatory receptors respond to?
What sense organ do phonoreceptors belong to?
What stimuli do thermoreceptors sense?
What do nociceptors detect?
Describe the flow of biological organization.
What is a neuron?
What is the main function of dendrites in a neuron?
What does the cell body of a neuron contain?
What is the function of the axon in a neuron?
What are nerve endings?
How does the body respond to heat?
What is the function of the nervous system?
What is the structure of a neuron illustrated in the diagram?
What is a synapse?
What is the neuromuscular junction?
What are nerve impulses?
How do signals pass through and between neurons?
What are sensory neurons responsible for?
What is the role of interneurons/relay neurons?
What do motor neurons do?
Define voluntary actions/movements.
Give examples of voluntary movements.
What are involuntary actions/movements?
Provide examples of involuntary movements.
Define reflex actions/movements.
What are examples of reflex actions?
What is a reflex arc?
Identify the components of a reflex arc diagram.
What receptors are involved in a reflex arc?
What message does the spinal cord send in a reflex action?
What is an effector in a reflex action?
What summarizes the control and coordination in organisms?
What are the main functions of the nervous system?
List the two roles of the endocrine system.
What structural units make up a neuron?
How do neurons transmit signals?
What is the primary function of sensory receptors?
Which system primarily controls voluntary actions?
What characterizes involuntary actions?
How do reflex actions differ from voluntary actions?
What type of neurons conduct impulses toward the CNS?
What type of neurons conduct impulses away from the CNS?
What encompasses the nervous system functions?
What occurs during a reflex action?
Where does the reflex arc begin?
What happens when emergency reflexes are triggered?
What type of neuron connects sensory and motor neurons?
Flashcards in this deck (70)
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What are the two main systems involved in coordination in animals?
- Nervous System
- Endocrine System
biology coordination animals -
What does the nervous system in animals consist of?
- Central Nervous System
- Peripheral Nervous System
biology nervous_system -
What are the components of the Central Nervous System?
- Brain
- Spinal Cord
biology cns -
How many pairs of cranial nerves are there in the Peripheral Nervous System?
12 pairs
biology pns nerves -
How many pairs of spinal nerves are present in the Peripheral Nervous System?
31 pairs
biology pns nerves -
What is the primary function of the nerve cells (neurons)?
Transmit signals throughout the body.
biology neurons -
What are the two main types of neurons?
- Sensory Neurons
- Motor Neurons
biology neurons -
What role do sensory receptors play in the nervous system?
Detect environmental stimuli and send signals to the brain.
biology sensors -
Which system in animals is associated with hormones?
Endocrine System
biology endocrine -
What is the function of plant hormones?
Regulate plant growth and behavior.
biology plants hormones -
What type of movements are exhibited in plants?
- Tropisms
- Nastic movements
biology plants movements -
What are auxin and gibberellin related to?
Plant hormones
biology hormones plants -
What diagrams are used to illustrate the human nervous system?
biology anatomy nervous_system -
What does the endocrine system involve?
- Glands that secrete hormones
- Regulation of metabolic processes
biology endocrine -
Provide a visual representation of the endocrine system.
biology anatomy endocrine_system -
What are the main movements associated with plants?
Directed responses to stimuli like light and gravity.
biology plants responses -
What is a stimulus?
Any change, factor, or agent causing a change in an organism's activity or behavior.
biology nervous_system -
Define receptors.
Cells, tissues, or organs that receive the stimulus.
biology nervous_system -
What is an effector?
Tissues, glands, or muscles acting in response to a received stimulus.
biology nervous_system -
What is a response?
The reaction of an organism toward a stimulus.
biology nervous_system -
List the basic sensory receptors in humans.
- Photoreceptors: Light
- Olfactory receptors: Smell
- Gustatory receptors: Taste
- Phonoreceptors: Sound
- Thermoreceptors: Heat/Cold
- Nociceptors: Pain
biology sensors -
What sense organ do photoreceptors belong to?
Eyes.
biology sensors -
What stimuli do olfactory receptors respond to?
Smell.
biology sensors -
What stimuli do gustatory receptors respond to?
Taste.
biology sensors -
What sense organ do phonoreceptors belong to?
Ear.
biology sensors -
What stimuli do thermoreceptors sense?
Heat/Cold.
biology sensors -
What do nociceptors detect?
Pain.
biology sensors -
Describe the flow of biological organization.
Cell → Tissue → Organs → Organ System → Organism.
biology organization -
What is a neuron?
Also known as a nerve cell, it transmits signals across the nervous system.
biology neurons -
What is the main function of dendrites in a neuron?
They collect information from previous neurons.
biology neurons -
What does the cell body of a neuron contain?
The nucleus and organelles, including mitochondria and endoplasmic reticulum.
biology neurons -
What is the function of the axon in a neuron?
Carries information from the cell body to the nerve endings.
biology neurons -
What are nerve endings?
The terminally branched portions of a neuron.
biology neurons -
How does the body respond to heat?
- Stimulus: Heat
- Receptor: Thermoreceptor
- Effector: Muscle of hand
- Response: Removal of hand.
biology response -
What is the function of the nervous system?
Control and coordination of activities within an organism.
biology nervous_system -
What is the structure of a neuron illustrated in the diagram?
biology neurons media -
What is a synapse?
A microscopic gap between two neurons where electrical signals are converted into chemical signals.
biology neuroscience synapse -
What is the neuromuscular junction?
The point of junction between the nerve ending of a motor neuron and a muscle.
biology neuroscience neuromuscular -
What are nerve impulses?
Waves of electrical and chemical signals carried along nerves or neurons, initiated by stimuli from the environment.
biology neuroscience nerve_impulses -
How do signals pass through and between neurons?
Information is collected by dendritic tips, setting off electric impulses that pass through the cell body to axon terminals, transmitting neurotransmitters across synapses.
biology neuroscience neurons -
What are sensory neurons responsible for?
They transmit nerve impulses from receptors to the Central Nervous System.
biology neurons functions -
What is the role of interneurons/relay neurons?
They connect sensory neurons and motor neurons.
biology neurons functions -
What do motor neurons do?
They transmit nerve impulses from the Central Nervous System to muscles or glands.
biology neurons functions -
Define voluntary actions/movements.
These actions can be controlled by our will and involve thinking.
biology nervous_system actions -
Give examples of voluntary movements.
- Walking
- Writing
- Dancing
- Jumping
biology nervous_system actions -
What are involuntary actions/movements?
Actions that cannot be controlled by our will; thinking is not involved.
biology nervous_system actions -
Provide examples of involuntary movements.
- Pumping of blood
- Peristaltic movements
- Contraction/relaxation of blood vessels
biology nervous_system actions -
Define reflex actions/movements.
Actions that cannot be controlled by our will; thinking and brain are not involved.
biology nervous_system reflexes -
What are examples of reflex actions?
- Withdrawal of hand from heat
- Closing eyelids from particles
- Sneezing
- Shivering in cold
biology nervous_system reflexes -
What is a reflex arc?
It is the pathway of the reflex action.
biology nervous_system reflexes -
Identify the components of a reflex arc diagram.
- Sensory neuron
- Relay neuron
- Motor neuron
- Spinal cord
- Receptors
- Effector
biology nervous_system reflexes -
What receptors are involved in a reflex arc?
Heat and pain receptors in the skin.
biology neurons reflexes -
What message does the spinal cord send in a reflex action?
Message to the brain.
biology nervous_system reflexes -
What is an effector in a reflex action?
Typically a muscle in the arm that responds to the neural signal.
biology nervous_system reflexes -
What summarizes the control and coordination in organisms?
It is mediated by the nervous and endocrine systems.
biology nervous_system endocrine -
What are the main functions of the nervous system?
- Control bodily functions
- Coordinate responses
- Process sensory information
biology nervous_system functions -
List the two roles of the endocrine system.
- Hormonal regulation
- Long-term changes in bodily functions
biology endocrine functions -
What structural units make up a neuron?
- Dendrites
- Cell body
- Axon
biology neurons structure -
How do neurons transmit signals?
By action potentials traveling along axons.
biology neurons functions -
What is the primary function of sensory receptors?
To detect environmental stimuli and initiate nerve impulses.
biology neurons functions -
Which system primarily controls voluntary actions?
The central nervous system (CNS) is mainly involved.
biology nervous_system actions -
What characterizes involuntary actions?
They occur without conscious thought or voluntary control.
biology nervous_system actions -
How do reflex actions differ from voluntary actions?
Reflex actions are automatic and occur without conscious thought.
biology nervous_system reflexes -
What type of neurons conduct impulses toward the CNS?
Sensory neurons.
biology neurons functions -
What type of neurons conduct impulses away from the CNS?
Motor neurons.
biology neurons functions -
What encompasses the nervous system functions?
- Sensory input processing
- Motor output
- Integration and coordination
biology nervous_system functions -
What occurs during a reflex action?
A quick response to a stimulus without conscious thought.
biology nervous_system reflexes -
Where does the reflex arc begin?
At sensory receptors which detect stimuli.
biology neurons reflexes -
What happens when emergency reflexes are triggered?
They activate muscles or glands almost instantly.
biology nervous_system reflexes -
What type of neuron connects sensory and motor neurons?
Relay neurons or interneurons.
biology neurons functions
Control and Coordination
Control and Coordination
Control and coordination in organisms involves two main systems:
Coordination in Animals
- Nervous System: Consists of neurons and is responsible for transmitting signals.
- Endocrine System: Involves hormones that regulate various functions.
Coordination in Plants
- Plant Movements: Changes due to environmental factors.
- Plant Hormones: Growth regulators that affect plant behavior.
Basic Terms
| Term | Definition |
|---|---|
| Stimulus | Any change that triggers a response in an organism. |
| Receptors | Cells or organs that receive the stimulus. |
| Effector | Tissues, glands, or muscles that act in response to stimuli. |
| Response | The reaction of an organism to a stimulus. |
Basic Sensory Receptors in Humans
| Receptor | Sense Organ | Stimuli |
|---|---|---|
| Photoreceptors | Eyes | Light |
| Olfactory receptors | Nose | Smell |
| Gustatory receptors | Tongue | Taste |
| Phonoreceptors | Ear | Sound |
| Thermoreceptors | Skin | Heat/Cold |
| Nociceptors | Skin | Pain |
Example of Response
- Stimulus: Heat
- Receptor: Thermoreceptor
- Effector: Hand muscle
- Response: Hand withdrawal
Neuron Structure
- Dendrites: Collect information.
- Cell Body: Contains the nucleus and organelles.
- Axon: Transmits signals to nerve endings.
Synapse
- Gap between two neurons where signals are transmitted.
Nerve Impulse
- Waves of electrical and chemical signals carried along nerves.
Types of Neurons
- Sensory Neurons: Transmit impulses from receptors to CNS.
- Interneurons: Connect sensory and motor neurons.
- Motor Neurons: Transmit impulses from CNS to muscles/glands.
Nervous Actions
- Voluntary Actions: Controlled consciously (e.g., walking).
- Involuntary Actions: Automatic functions (e.g., pumping blood).
- Reflex Actions: Immediate responses without brain involvement (e.g., hand withdrawal).
Reflex Arc
- Pathway that involves sensory neuron, relay neuron, motor neuron, spinal cord, and effector.