ANS level 2 receptors (cholinergic/adrenergic) and subtypes (musc, nic, a, b1, b2)

Question 1

Stimulation of the beta receptors on heart muscle cells results in:

Question 1Select one:

a.
decreased force of contraction.

b.
slower heart rate.

c.
increased heart rate and force of contraction.

d.
the decrease in ATP production.

e.
inhibition of the heart muscle.

Answer 1

c.
increased heart rate and force of contraction.

Question 2

Signals from the sympathetic nervous system cause which of the following?

Question 2Select one:

a.
increase in the production of digestive enzymes and absorption

b.
slower metabolic rate

c.
slower pulse

d.
reduced blood flow to the abdominal organs

Answer 2

d.
reduced blood flow to the abdominal organs

Question 3

Tom suffers from hypertension. Which of the following might help deal with his problem?

Question 3Select one:

a.
a drug that blocks alpha-1 receptors in smooth muscle

b.
a drug that blocks beta receptors in cardiac muscle tissue

c.
a drug that blocks alpha-1 receptors in smooth muscle and blocks beta receptors in cardiac muscle tissue

d.
a drug that blocks alpha-2 receptors in adipose tissue

e.
a drug that increases cAMP levels in cardiac muscle tissue.

Answer 3

c.
a drug that blocks alpha-1 receptors in smooth muscle and blocks beta receptors in cardiac muscle tissue

Question 4

A decrease in the autonomic tone of the smooth muscle in a blood vessel of skeletal muscles would result in:

Question 4Select one:

a.
an increase in vessel diameter.

b.
an increase in blood flow through the vessel.

c.
no change in vessel diameter.

d.
a decrease in blood flow through the vessel.

Answer 4

d.
a decrease in blood flow through the vessel.

Question 5

Muscarinic receptors:

Question 5Select one:

a.
always produce an excitatory response.

b.
control sodium channels in the affected membrane.

c.
are found mostly in autonomic ganglia.

d.
are blocked by norepinephrine.

e.
are normally coupled to G proteins and activated by acetylcholine

Answer 5

e.
are normally coupled to G proteins and activated by acetylcholine

Question 6

Tom suffers from hypertension. Which of the following might help deal with his problem?

Question 6Select one:

a.
a drug that increases cAMP levels in cardiac muscle tissue.

b.
a drug that blocks alpha-1 receptors in smooth muscle

c.
a drug that blocks alpha-1 receptors in smooth muscle and blocks beta receptors in cardiac muscle tissue

d.
a drug that blocks alpha-2 receptors in adipose tissue

e.
a drug that blocks beta receptors in cardiac muscle tissue

Answer 6

c.
a drug that blocks alpha-1 receptors in smooth muscle and blocks beta receptors in cardiac muscle tissue

Question 7

Drugs that have effects similar to those of sympathetic activation are called sympathomimetic drugs. Which of the following would you not expect to observe in a person who has taken a sympathomimetic drug?

Question 7Select one:

a.
sweating

b.
decreased blood pressure

c.
increased heart rate

d.
increased blood sugar level

e.
dilation of respiratory passages

Answer 7

b.
decreased blood pressure

Question 8

An inhaler used to treat airway constriction in asthma or allergy might contain a drug that:

Question 8Select one:

a.
activates β2 adrenergic receptors.

b.
activates β1 adrenergic receptors.

c.
blocks β2 adrenergic receptors.

d.
activates muscarinic cholinergic receptors.

Answer 8

a.
activates β2 adrenergic receptors.

Question 9

Nicotinic receptors:

Question 9Select one:

a.
respond to norepinephine and adrenaline

b.
are found at neuromuscular interfaces of the sympathetic nervous system.

c.
can be either excitatory or inhibitory in function.

d.
are coupled to G proteins

e.
open chemically-gated sodium ion channels.

Answer 9

e.
open chemically-gated sodium ion channels.

Question 10

Each of the following effects is associated with the action of postganglionic sympathetic fibers except:

Question 10Select one:

a.
decreased heart rate.

b.
increased blood flow to skeletal muscles.

c.
dilation of the pupils.

d.
increased sweat secretion.

e.
reduced circulation to the skin.

Answer 10

a.
decreased heart rate.

Question 11

Drugs known as beta-blockers may be useful for treating:

Question 11Select one:

a.
excessive salivation.

b.
excessive heart rate

Answer 11

b.
excessive heart rate

Question 12

Muscarinic receptors on autorythmic cells:

Question 12Select one:

a.
are found mostly in autonomic ganglia.

b.
activate G proteins that open potassium channels

c.
control sodium channels in the affected membrane.

d.
always produce an excitatory response.

Answer 12

b.
activate G proteins that open potassium channels

Question 13

Nicotinic receptors on respiratory muscles.

Question 13Select one:

a.
can be either excitatory or inhibitory in function.

b.
respond to epinephrine.

c.
open chemically-gated sodium ion channels.

d.
are found at neuromuscular interfaces of the sympathetic nervous system.

e.
respond to norepinephrine.

Answer 13

c.
open chemically-gated sodium ion channels.

Question 14

A certain drug decreases heart rate by blocking a receptor on cardiac pacemaker cells. This drug probably binds to ________ receptors.

Question 14Select one:

a.
alpha-2 adrenergic

b.
muscarinic cholinergic

c.
alpha-1 adrenergic

d.
beta-1 adrenergic

e.
nicotinic cholinergic

Answer 14

d.
beta-1 adrenergic

Question 15

A decrease in the autonomic tone of the smooth muscle in a blood vessel of the skin would result in:

Question 15Select one:

a.
no change in vessel diameter.

b.
an increase in blood flow through the vessel.

c.
a decrease in vessel diameter.

d.
a decrease in blood flow through the vessel.

Answer 15

b.
an increase in blood flow through the vessel.

Question 16

Stimulation of the beta receptors on heart muscle cells results in:

Question 16Select one:

a.
decreased force of contraction.

b.
the decrease in ATP production.

c.
increased heart rate and force of contraction.

d.
slower heart rate.

e.
inhibition of the heart muscle.

Answer 16

c.
increased heart rate and force of contraction.