definitions for nervous system

Question 1

Nerves

Answer 1

combination of many nerve fibers located at the outside of the brain and spinal cord

Question 2

neurotransmitters

Answer 2

special chemicals
Located at the end of each axon that allows for the nerve impulses to pass from one neuron to another

Question 3

synapses

Answer 3

Spaces between the axon of one neuron and the dendrites of many other neurons

Question 4

myelin sheath (what does it do)

Answer 4

Increases rate of impulse transmission
Insulates and maintains the axon

Question 5

neuron or nerve cell

Answer 5

Basic structural unit of the nervous system

Question 6

nervous system

Answer 6

complex, highly organized system that coordinates all the activities of the body

Question 7

meninges

Answer 7

membranes or protective lining that covers the brain and spinal cord
there are THREE

Question 8

efferent/motor nerves

Answer 8

Carry messages from the brain and spinal cord to the muscle and glands

Question 9

afferent/sensory nerves

Answer 9

Carrie messages from all of the parts of the body to the brain and spinal cord

Question 10

associative or internuncial nerves

Answer 10

Carries both sensory and motor messages

Question 11

brain

Answer 11

Mass of nerve tissue, well protected by membranes of the cranium or skull

Question 12

cerebrospinal fluid

Answer 12

circulate continually between the ventricles and through the subarachnoid space
Serves as a shock absorber to protect brain and spinal cord

Question 13

ventricles

Answer 13

Hollow Spaces that connect with each other and with the space under the arachnoid membrane