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Neurons
Peripheral Nervous System
Tidbits
Nerve Impulses
Functions
100
Nerve cell or nerve fiber.
What is a neuron?
100
Nerve responsible for visceral functions.
What is the vagus nerve?
100
Also called "rest and digest".
What is the parasympathetic division?
100
Another name for nerve impulse.
What is action potential?
100
Processes information, site of intelligence, coordinates voluntary adn involuntary responses.
What is the function of the CNS?
200
Process that carries information away from the cell body.
What is an axon?
200
Branch of nervous system responsible for involuntary action.
What is the autonomic nervous system?
200
Results in reduced brain size, fewer synapses, and memory lapses.
What is the aging process?
200
- 60mV.
What is thresh hold?
200
Monitors internal and external environment.
What is the PNS?
300
Collection of cell bodies or somas in the CNS.
What is gray matter?
300
Branch of the autonomic nervous system that is responsible for the 'fight or flight' response.
What is sympathetic nervous system?
300
Controls life functions such as heart rate.
What is the medulla oblongata?
300
Begins the action potential process.
What is the opening of Sodium ion channels?
300
Maintains a blood-brain barrier.
What is an astrocyte?
400
Insulates the axon.
What is myelin?
400
Carries information away from a receptor and towards the CNS.
What is a sensory or afferent neuron?
400
Creates smooth skeletal muscle movements.
What is the cerebellum?
400
Actions along the axon that will begin the re-polarization state.
What is the closing of the sodium channels and the opening of the potassium channels?
400
Signal post-synaptic cells.
What are neurotransmitters?
500
Enables a neuron to return to its resting state after.
What is the sodium-potassium pump?
500
Includes a receptor, sensory fiber, possibly interneurons, a motor fiber, and effector.
What is a reflex?
500
This structure is the connection between the cerebral hemispheres.
What is the corpus collosum?
500
The time during which no other action potential may occur.
What are the refractory period?
500
Supports the brain, carries wastes and nutrients.
What is the cerebral spinal fluid?