Ch 3

Question 1

neurons

Answer 1

basic building blocks of the nervous system
cells that communicate with one another

Question 2

dendrites + axon

Answer 2

structures unique to the neuron

Question 3

axons covered in myelin that conduct electrical signals called __________

Answer 3

action potentials

Question 4

synapse

Answer 4

junction between 2 neurons

Question 5

what type of event is a neural transmission

Answer 5

electrochemical

Question 6

receptor sites

Answer 6

large protein molecules on neurons

Question 7

2 types of receptors responsible for changes of binding

Answer 7

ionotropic + metabotropic receptors

Question 8

ionotropic receptors

Answer 8

directly coupled with ion channels
rapid changes, msec in duration

Question 9

metabotropic receptors

Answer 9

not directly coupled with ion channels
result in delayed changes, long-lasting

Question 10

T/F : G proteins may initiate synthesis of second messengers

Answer 10

T

Question 11

mimicry

Answer 11

drugs chemically resembling natural neurotransmitters can bind to receptor sites, fooling them into reacting the same way

Question 12

affecting enzyme activity

Answer 12

enzyme breakdown + reuptake

Question 13

agonists

Answer 13

fit receptors and activate them

Question 14

antagonists

Answer 14

fit but do not activate – stop other things from activating receptors

Question 15

indirect agonists/antagonists

Answer 15

enhance or inhibit neurotransmitter activity w/o binding to receptors

Question 16

norepenephrine

Answer 16

discovered early
found outside + inside the brain

Question 17

what does norepenephrine inside the brain do

Answer 17

regulates hunger, alertness, and arousal

Question 18

what does norepenephrine outside the brain do

Answer 18

mediates the physical changes of emotional arousal

Question 19

serotonin

Answer 19

important in regulating sleep

Question 20

dopamine

Answer 20

regulates coordinated motor movements