Lecture 2- neuro

Question 1

T or F: brain size & surface area : volume ratio are inversely related

Answer 1

T

Question 2

T or F: PNS carries info to CNS & CNS transmits it to body

Answer 2

T

Question 3

3 types of neurons

Answer 3

afferent, interneurons, efferent

Question 4

afferent neurons- function & primary nervous system- cell body

Answer 4

responds to stimulus, PNS mainly

cell body- PNS
axon terminals- CNS

Question 5

interneurons- function & primary nervous -system- cell body

Answer 5

integrates info, CNS only

cell body- CNS
axon terminals- CNS

Question 6

T or F: interneurons make up 99% of neurons

Answer 6

T

Question 7

efferent- function & primary nervous system- cell body

Answer 7

transmits signals to body, PNS primarily

cell body- CNS
axon terminals- PNS

Question 8

what neuron is the CNS -> PNS communication link?

Answer 8

efferent

Question 9

what neuron releases acetylcholine & norepinephrine?

Answer 9

efferent

Question 10

autonomic vs somatic nervous system
- what NT, neuron #, horn, control, centre of control

Answer 10

A- acetylcholine & norepinephrine, 2 neurons, lateral horn, reflex control, hypthalamus

S- acetylcholine only, 1 neuron, ventral horn, reflex & non-reflex control, cerebellum

Question 11

what is the CNS made of

Answer 11

neurons & glial cells

Question 12

what do glial cells make up?

Answer 12

the connective tissue of CNS

Question 13

what % of neuron volume do glial cells take up?

Answer 13

50%

Question 14

T or F: glial cells has a negative correlation with brain size

Answer 14

F, is positive correlation

Question 15

astrocytes function

Answer 15

holds neurons together

Question 16

most abundant neuron

Answer 16

astrocyte

Question 17

oligodendrocytes function

Answer 17

forms myelin patch

Question 18

ependymal function

Answer 18

lines cavities of CNS

Question 19

special feature of ependmyal

Answer 19

are ciliated - beating action allows flow of cerebrospinal fluid

Question 20

microglial cells function

Answer 20

immune defense

Question 21

resting vs activated microglial cells

Answer 21

R- wispy cells move to infection site
A- removes / attacks invaders

Question 22

T or F: microglial cells can cause neurodegeneration if they respond wrong

Answer 22

T

Question 23

sympathetic vs parasympathetic

Answer 23

S: tone activity, needs stimulus, fight or flight
P: tonic activity, doesn’t need stimulus, rest & digest

Question 24

T or F: sympathetic & parasympathetic are apart of autonomic nervous system

Answer 24

T