nervous system

Question 1

sensory afferent division

Answer 1

conveys impulses TO the cns

Question 2

motor efferent division

Answer 2

carries impulses FROM the cns to viscera or muscles glands

Question 3

neuroglia

Answer 3

“nerve glue” support insulate and protect delicate neurons

Question 4

Astrocytes

Answer 4

anchors neurons to nutrient supply lines, numerous.

Question 5

microglia

Answer 5

phagocyes that dispose of debris

Question 6

ependymal cells

Answer 6

line cavities of brain and spinal cord. circulates Cerebrospinal fluid

Question 7

Oligodendrocytes

Answer 7

produce myelin sheaths. cant transmit nerve pulses

Question 8

axons

Answer 8

conduct nerve impulses away from the cell body

Question 9

association neurons (interneurons)

Answer 9

connect the motor and sesory neurons in neural pathways

Question 10

multipolar neuron

Answer 10

multiple number of processses extending from the cell body

Question 11

bipolar neurons

Answer 11

rare in adults, found in special sense organs, receptor cells

Question 12

unipolar neurons

Answer 12

single process from cell body very short

Question 13

action potential (never impulse)

Answer 13

an activated long distance signal

Question 14

depolarization

Answer 14

more possitive ions on the outter face than on the inner changes polarity of the membrane

Question 15

polarized

Answer 15

fewer positive ions on the inner face of the membrane than on the outside

Question 16

repolarization

Answer 16

outflow of possitive ions from the cell restoring to polarized (resting) stage

Question 17

cerebral hemispheres

Answer 17

most superior part of the brain

Question 18

neural tube

Answer 18

devoping CNS in an embryo

Question 19

ganglia

Answer 19

small collections of cell bodies found outside the CNS in the PNS

Question 20

schwan cells

Answer 20

form the myelin sheaths

Question 21

sensory input

Answer 21

where stimuli is gathered

Question 22

integration

Answer 22

where the decision on what to do is made

Question 23

motor output

Answer 23

the response by muscles or glands

Question 24

reflex arcs

Answer 24

reflex that occurs over neural pathways

Question 25

autonomic reflex

Answer 25

regulate the activity of smooth muscles the heart and other glands

Question 26

somatic reflex

Answer 26

all reflex that stimulate the skeletal muscles

Question 27

irritability

Answer 27

ability to respond to stimulus and convert into a nerve impulse

Question 28

conductivity

Answer 28

ability to trasmit the impulse to other neurons

Question 29

white matter

Answer 29

consist of dense myelinated fibers

Question 30

grey matter

Answer 30

unmyelinated fibers and cell bodies