ch 3

Question 1

PNS

Answer 1

everything outside of brain and spinal cord

Question 2

sensory neuron

Answer 2

afferent, receives info (PNS–> CNS)

Question 3

interneuron

Answer 3

transfer of info between neurons
ex. spinal cord in between motor an sensory neurons

Question 4

motor neuron

Answer 4

effector (efferent), CNS–> PNS, muscles, glands

Question 5

motor neuron death=?

Answer 5

paralysis etc.

Question 6

glial cells (glue?)

Answer 6

glial cells and neurons make up nervous system

Question 7

altroglia

Answer 7

creates blood-brain barrier to protect brain from viruses etc.

Question 8

oligodendroglia

Answer 8

provides myelin sheath

Question 9

microglia

Answer 9

cleans up dead cells and prevents infection in brain

Question 10

4 main functions of glial cells

Answer 10

1. surround neurons and hold them in place
2. supply nutrients and oxygen to neurons
3. insulate one neuron from another
4. destroy and remove dead neurons

Question 11

where are glial cells

Answer 11

both CNS and PNS

Question 12

nodes of ranvier

Answer 12

speeds up action potential, gaps in myelin sheath

Question 13

myelin sheath

Answer 13

protective

Question 14

major neurotransmitters

Answer 14

Serotonin, norepinephrine, dopamine, glutamate, GABA, Acetylcholine (Ach)

Question 15

glutamate
(function and associated drugs)

Answer 15

-learning and memory, movement, emotions, cognition
-ketamine

Question 16

GABA

Answer 16

-learning, anxiety regulation
-valium etc.

Question 17

Acetylcholine

Answer 17

-learning, attention, movement of muscles
-nicotine

Question 18

Dopamine

Answer 18

-movement, reward learning, addiction
-cocaine, heroine, meth

Question 19

Serotonin

Answer 19

-mood regulation, sleep, memory
-ecstacy, LSD etc.

Question 20

Norepinephrine

Answer 20

-attention, arousal
-adderall

Question 21

dorsal and ventral

Answer 21

afferent signals go to dorsal horns (back)
efferent signals come from ventral horns

Question 22

PNS divisions

Answer 22

-somatic: voluntary movement of skeletal muscles
-autonomic (cardiac muscle and glands): sympathetic (arousing) and parasympathetic (calming)