exam 1 study guide

Question 1

brains cells include

Answer 1

neurons and glia

Question 2

peripheral nervous system consists of which two divisions

Answer 2

sensory (picks up sensory stimuli) and motor (send signals from brain to muscles and glands)

Question 3

somatic nervous system

Answer 3

skeletal muscle movement

Question 4

autonomic

Answer 4

involuntary nervous system (heart beat)

Question 5

sympathetic nervous system

Answer 5

mobilizes body into action

Question 6

parasympathetic nervous system

Answer 6

calms the body down

Question 7

glial cells

Answer 7

provide support nutrition insulation and help with signal transmission

Question 8

astrocytes

Answer 8

star shaped. found in CNS. anchor neurons to blood supply and help with exchange

Question 9

microglial cells

Answer 9

immune defense

Question 10

ependymal cells

Answer 10

crest, secrete, and circulate CSF

Question 11

oligodendrocytes

Answer 11

wrap around neurons and produce an insulating barrier called the myelin sheath

Question 12

satellite cells

Answer 12

surround and support neurons

Question 13

dendrites

Answer 13

pick up messages. branchlike

Question 14

multipolar neuron

Answer 14

normal looking neuron

Question 15

bipolar neurons

Answer 15

one axon and on single dendrite

Question 16

unipolar neurons

Answer 16

one process

Question 17

ohms law

Answer 17

I=V/R
current= voltage/resistance

Question 18

proteins are assembled from

Answer 18

amino acids composing enzymes , cytoskeletal elements, receptors

Question 19

absolute refractory period

Answer 19

cell cannot fire a second action potential

Question 20

relative refractory period

Answer 20

cell is hyper polarized. second action potential possible with stronger than normal stimulus

Question 21

saltatory conduction

Answer 21

jumps from one node of ranvier to the next

Question 22

catecholminergic neurons

Answer 22

involved in movement mood attention and visceral function (dopamine, norepinephrine, adrenaline)

Question 23

serotonergenic neurons

Answer 23

regulate mood emotional behavior and sleep (ssri)

Question 24

ionotropic neuron receptors

Answer 24

fast transmission, detectors for chemicals and voltage, regular large currents

Question 25

taste pathway comes into the brain at the

Answer 25

medulla oblongata (gustatory nucleus)

Question 26

taste map project to

Answer 26

the thalamus. then to primary gustatory cortex