pre-class quiz nervous system: g-proteins and neurotransmitters

Question 1

the g-alpa I pathway affects which of the following second messengers?
a) protein kinase c
b) PLC
c) cAMP

Answer 1

c) cAMP

Question 2

a g-protein results in the activation of-
a) second messenger
b) ion channel and second messenger
c) ion channel
d) ion channel or second messenger

Answer 2

d) ion channel or second messenger

Question 3

what part of the g-protein will leave with GTP?
a) beta
b) gamma
c) alpha

Answer 3

c) alpha

Question 4

nicotine and muscarine are-
a) agonists
b) neither agonists nor antagonsits
c) antagonists

Answer 4

b) neither agonists nor antagonists

Question 5

the heart has-
a) beta-2 receptor
b) alpha-1 receptor
c) beta-1 receptor

Answer 5

c) beta-1 receptor

Question 6

which of the following causes the sarcoplasmic reticulum to release calcium?
a) cAMP
b) protein kinase a
c) DAG
d) IP3

Answer 6

d) IP3

Question 7

protein kinase a causes a/n
a) increase in activity of the calcium pump
b) decrease in activity of the potassium pump
c) decrease in activity of the calcium pump

Answer 7

a) increase in activity of the calcium pump

Question 8

a g-protein results in the activation of-
a) ion channel
b) ion channel or second messenger
c) ion channel and second messenger
d) second messenger

Answer 8

b) ion channel and second messenger

Question 9

if neurotransmitters can bind to the same receptors, one neurotransmitter activates a receptor and the other prevents activation of that receptor. they are considered -
a) antagonists
b) agonists
c) neither agonists nor antagonists

Answer 9

a) antagonists

Question 10

cholinergic receptors are activated by
a) acetylcholine
b) norepinephrine
c) adrenalin

Answer 10

a) acetylcholine

Question 11

the g-alpha I pathway results in the
a) activation of protein kinase A
b) inactivation of protein kinase C
c) inactivation of protein kinase A

Answer 11

c) inactivation of protein kinase A

Question 12

what enzyme helps the g-alpha I pathway inactivate cAMP?
a) PIP2
b) protein kinase a
c) PLC
d) PDE

Answer 12

d) PDE

Question 13

nictone and acetylcholine are
a) antagonists
b) agonists
c) neither agonists nor antagonists

Answer 13

b) agonists

Question 14

the g-alpha s pathway affects which of the following second messengers?
a) cAMP
b) PLC
c) PIP2

Answer 14

a) cAMP

Question 15

which of the following directly activate ion channels (SELECT ALL THAT APPLY)
a) nictoinic cholinergic receptors
b) muscarinic cholinergic receptors
c) adrenergic receptors

Answer 15

a) nicotinic cholinergic receptors

Question 16

which of the following activate g-proteins (select all that apply)
a) nicotinic cholinergic receptors
b) muscarinic cholinergic receptors
c) adrenergic receptors

Answer 16

b and c

Question 17

the g-alpha I pathway affects which of the following second messengers?
a) cAMP
b) PLC
c) protein kinase c

Answer 17

a) cAMP

Question 18

neurotransmitters activate
a) ligand-gated channels
b) voltage-gated channels
c) leak channels

Answer 18

a) ligand-gated channels

Question 19

which of the following is fast-acting?
a) metabotropic receptor
b) ionotropic receptor

Answer 19

b) ionotropic receptor

Question 20

what receptor activates a g-alpha S pathway?

Answer 20

beta receptor

Question 21

what receptor activates g-alpha I pathway?

Answer 21

alpha 2 receptors

Question 22

what receptor activates g-alpha q pathway?

Answer 22

alpha 1 receptors