Mod 9

Question 1

What is phrenology?

Answer 1

the study of bumps on the skull. Franz Gall believed it would show brain size and association of mental abilities and characteristics

Question 2

What are neurons?

Answer 2

building block of the nervous system

Question 3

What is the cell body?

Answer 3

part of the neuron that has the nucleus and cell life support center

Question 4

What are the dendrites?

Answer 4

neurons branching extension that receive and integrate messages, conduction impulses to the cell body

Question 5

What is an axon do?

Answer 5

a neuron extensions that passes messages through branches to other neurons

Question 6

What is the myelin sheaths?

Answer 6

layer of fatty tissue that shields axon and speads up impulses

Question 7

What are glial cells?

Answer 7

they support, nourish and protect neurons

Question 8

What is action potential?

Answer 8

a brief electrical charge that travels down an axon

Question 9

what are ions?

Answer 9

electrically charged atoms

Question 10

The axons surface is selectively

Answer 10

permeable

Question 11

What is the resting period?

Answer 11

Fluid outside the membrane is mostly positive and inside is mostly negative

Question 12

What is depolarization?

Question 13

What are excitatory neurons?

Answer 13

they encourage action

Question 14

what are inhibitory neurons?

Answer 14

they discourage action

Question 15

action potential occurs bc ______ > _______

Answer 15

excitatory; inhibitory

Question 16

what’s a threshold?

Answer 16

minimum levels of stimulation for a neural response to occur

Question 17

what is the all or none response?

Answer 17

neurons either fire everything or none at all

Question 18

How do neurons communicate?

Answer 18

Through synapses which are junctions between axon tip and dendrite

Question 19

What are neurotransmitters?

Answer 19

chemical messengers that cross synaptic gap and bind to receptor sites on dendrite

Question 20

What is reuptake?

Answer 20

reabsorption of extra neurotransmitters

Question 21

What is ACh role?

Answer 21

It enables muscle action, learning and memory.

Question 22

What is dopamines role?

Answer 22

influences movement, learning, attention and emotion

Question 23

What is serotonins role?

Answer 23

affects mood, hunger, sleep and arousal

Question 24

What is GABA’s role?

Answer 24

a major inhibitory neurotransmitter

Question 25

What is glutamate role?

Answer 25

a major excitatory neurotransmitter

Question 26

What do agonists drugs do?

Answer 26

excite and amplify normal sensations

Question 27

What do antagonist drugs do?

Answer 27

inhibit and block NT functioning