Practice Nervous System Vocabulary
Name:
A. The group of nerves in the PNS that controls voluntary actions.
— Stimulus
B. The part of the central nervous system that is located in the skull and
controls most functions in the body.
— Response
C.
— Neuron
— nerve impulse
— dendrite
D. The thick column of nervous tissue that links the brain to most of the nerves
in the PNS.
E. The clear tissue that covers the front of the eye.
F.
— axon
— nerve
— sensory neuron
Any change or signal in the environment that can make an organism react in
some way.
A neuron that picks up stimuli from the internal or external environment
and converts each stimulus into a nerve impulse.
G. What the body does in reaction to a stimulus.
H. The part of the brain that lies between the cerebellum and the spinal cord
that controls involuntary actions.
I.
The part of the brain that interprets input from the senses, controls
movement, and carries out complex mental processes.
— motor neuron
J.
A neuron that carries nerve impulses from one neuron to another.
— synapse
K. A threadlike extension of a neuron that carries nerve impulses away from
the cell body.
— central nervous system
L.
— interneuron
— peripheral nervous system
— brain
— brain stem
— spinal cord
— cerebrum
— Cerebellum
— somatic nervous system
— cornea
A threadlike extension of a neuron that carries nerve impulses toward the
cells body.
M. The junction where one neuron can transfer an impulse to the next
structure.
N. The division of the nervous system consisting of all the nerves located
outside the central nervous system.
O. The division of the nervous system consisting of the brain and spinal cord.
P.
The message carried by a neuron.
Q. A bundle of nerve fibers.
R. A neuron that sends an impulse to a muscle or gland, causing the muscle or
gland to react.
S.
A cell that carries information through the nervous system.
T.
The part of the brain that coordinates the actions of the muscles and helps
maintain balance.
A. Sensory receptors in the nose.
— autonomic nervous system
B. The bundle of nerve fibers that send the impulse to the brain to be
interpreted.
— reflex
— concussion
— ciliary muscle
C. The membrane that separates the outer ear from the middle ear,
and that vibrates when sound waves strike.
D. A snail-shaped tube in the inner ear that is lined with receptor cells
that respond to sound.
E. The condition in which a person can see nearby objects clearly.
— pupil
F. The flexible structure that focuses light that has entered the eye.
— iris
G. The group of nerves in the PNS that controls involuntary actions.
— lens
H. The insulating envelope of myelin that surrounds the core of a
nerve fiber or axon and facilitates the transmission of nerve
impulses.
— retina
I. Controls the size of the pupil and helps the lens to focus.
— blind spot
J. chemicals which allow the transmission of signals from one neuron
to the next across synapses.
— optic nerve
K. Structures in the inner ear that are responsible for the sense of
balance.
— nearsightedness
L. Point where the retina attaches to the optic nerve.
— farsightedness
M. A bruise-like injury of the brain that occurs when the soft tissue of
the brain collides against the skull.
— eardrum
N. An automatic response that occurs rapidly and without conscious
control.
— cochlea
O. The opening through which light enters the eye.
— semicircular canal
P. The layer of receptor cells at the back of the eye on which an image
is focused, upside down.
— neurotransmitter
— olfactory cells
— myelin sheath
Q. The circular structure that surrounds the pupil and regulates the
amount of light entering the eye, and is controlled by the ciliary
muscle.
R. The condition in which a person can see distant objects clearly.