nervous system

Question 1

nervous system

Answer 1

master controlling and communicating system of the body

Question 2

sensory input

Answer 2

gathered information from senses

Question 3

integration

Answer 3

processes and interprets the sensory input

makes decisions

Question 4

central nervous system

Answer 4

consists of brain and spinal cord

interpret incoming sensory info and issue instrutions

Question 5

peripheral nervous system

Answer 5

consists of nerves that extend from brain to spinal cord

Question 6

somatic nervous system

Answer 6

allows us to voluntarily control skeletal muscles

Question 7

autonomic nervous system

Answer 7

regulates involuntary events in the body

Question 8

neuroglia

Answer 8

“nerve glue”

support, insulate, and protect neurons

Question 9

astrocytes

Answer 9

star-shaped cells

Question 10

microglia

Answer 10

dispose of dead brain cells and bacteria

Question 11

ependymal cells

Answer 11

line cavities of brain and spinal cord

Question 12

oligodendrocytes

Answer 12

produce myelin sheaths

Question 13

schwann cells

Answer 13

form myelin sheaths around nerve fibers

Question 14

satellite cells

Answer 14

protective, cushioning cells

Question 15

neurons

Answer 15

transmit messages from one part of body to another

Question 16

dendrites

Answer 16

neuron processes that bring incoming messages toward cell body

Question 17

axons

Answer 17

generate nerve impulses and conduct them away from cell body

Question 18

axon hillock

Answer 18

cone-like region of cell body

Question 19

axon terminals

Answer 19

where axons branch off are axon terminals

Question 20

myelin

Answer 20

whitish, fatty material

Question 21

nodes of Ranvier

Answer 21

gaps or indents in Schwann cells

Question 22

depolarization

Answer 22

inward rush of sodium ions changes the polarity of neuron’s membrane at that site

Question 23

action potential

Answer 23

transmit long distance signal

Question 24

repolarization

Answer 24

outflow of positive ions from cell restores electrical conditions

Question 25

cerebrum

Answer 25

most superior part of brain

Question 26

parietal lobe

Answer 26

place where the somatic sensory area is located

Question 27

frontal lobe

Answer 27

place where the primary motor area is located

Question 28

occipital lobe

Answer 28

place where vision area is located

Question 29

temporal lobe

Answer 29

place where auditory area is located

Question 30

gray matter

Answer 30

outermost part of cerebrum

Question 31

cerebral white matter

Answer 31

composed of fiber tracts

carry impulses to or from cerebral cortex

Question 32

cerebellum

Answer 32

provides precise timing for skeletal muscle activity and controls balance and equilibrium