22 terms

The Nervous System

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Stimulus
Any change or signal in the envoirment that can make an organism react in some way.
Response
An action or change in behavior that occurs as a result of stimulus
Neuron
A cell that carries information through the nervous system.
nerve impulse
The massages carried by a neuron.
dendrite
A threadlike extension of a neuron that carries nerve impulses toward the cell body.
axon
A threadlike extension of a neuron that carries nerve impulses away from the cell body.
Nerve
A bundle of nerve fiber.
Sensory neuron
A neurons that pick up stimuli from the internal or external envoirment and converts each stimulus into a nerve impulse.
Motor neuron
A neurons that sends an impulse to a muscle or gland causing the muscle or gland to react
synapse
The junction where one neuron can transfer an impulse to the next structure.
Central nervous system
The division of the nervous system consisting of the brain and spinal cord.
peripheral nervous system
The division of the nervous system consisting of all the nerves located outside the central nervous system.
Brain
The part of the central nervous system that is located in the skull and controls most function in the body.
Spinal cord
The thick column of nervous tissue that kinks into the brain to most of the peripheral nervous system.
cerebrum
the part of the brain that interrupts input from the senses, control movement, and carries out complex mental process.
cerebellum
The part of the brain that coordinates the actions of the muscles.
Brain stem
The part of the brain that lies between the cerebellum and spinal cord.
Somatic nervous system
The group of nerves in the peripheral nervous system.
Autonomic nervous system
The group of nerves in the peripheral nervous system that controls involuntary actions
Reflex
an automatic response that occurs rapidly and without conscious control
Concussion
when the soft tissue of the brain is bruised against the skull
interneuron
a neuron that carries nerve impulses from one neuron to another