Nervous System

Question 1

Nervous System

Answer 1

master controlling and communicating system of the body

Question 2

Sensory Input

Answer 2

information that the body gathers

Question 3

Integration

Answer 3

activates receptors or glands

Question 4

central nervous system

Answer 4

consists of the brain and the spinal cord

Question 5

peripheral nervous system

Answer 5

consists mainly of the nerves that extend from the brain and spinal cord

Question 6

autonomic nervous system

Answer 6

regulates involuntary events

Question 7

neuroglia

Answer 7

support, protect, and insulate neurons

Question 8

astrocytes

Answer 8

star shaped cells that account for nearly half the neural tissue

Question 9

Somatic Nervous system

Answer 9

allows us to consciously control our skeletal muscles

Question 10

microglia

Answer 10

spider like phagocytes that dispose of debris

Question 11

ependymal cells

Answer 11

glial cells that line the cavities of the brain and the spinal cord

Question 12

oligodendrocytes

Answer 12

glia that wrap their flat extension tightly around the nerve fibers

Question 13

Schwann cells

Answer 13

form myelin sheaths around nerve fibers

Question 14

satellite cells

Answer 14

act as protective cushioning cells

Question 15

neurons

Answer 15

transmit nerve impulses across the body

Question 16

dendrites

Answer 16

generate nervous impulses toward the cell body

Question 17

axons

Answer 17

generate nervous impulses away from the cell body

Question 18

axon hillock

Answer 18

cone like region in the cell body where the axon is

Question 19

axon terminals

Answer 19

axon branches out with lots of axon terminals

Question 20

myelin

Answer 20

whitish, fatty material that covers most long nerve fibers

Question 21

nodes of Ranvier

Answer 21

gaps or indentations in myelin sheath

Question 22

depolarization

Answer 22

inward rush of sodium ions

Question 23

action potential

Answer 23

different ions cross the neuron membrane

Question 24

repolarization

Answer 24

change in membrane potential that returns it to a negative value

Question 25

cerebrum

Answer 25

responsible for the integration of complex sensory and neural functions

Question 26

parietal lobe

Answer 26

concerned with the reception and correlation of sensory information