Adrenergic Agonists - QUIZ

Question 1

Alpha and Beta agonists mimic the actions of the parasympathetic nervous system. True or False?

Answer 1

False

Question 2

List the effects of the following adrenergic receptors: A1, A2, B1, B2

Answer 2

A1: Vasoconstriction of arteries & veins, slight coronary artery constriction
A2: Constricts coronary arterioles, decreases insulin secretion, inhibits lipolysis
B1: Increased SA node firing rate & ventricular contraction, vasodilates renal arteries
B2: Vasodilation, decreased PVR, muscle and liver glycogenolysis

Question 3

List the 5 ways indirect adrenergic agonists exert their effects:

Answer 3

Releasing endogenous hormones
Uptake inhibition
MAO inhibition
COMT inhibition
Releasing agents

Question 4

Adrenergic agonists are classified by 3 components. Name them.

Answer 4

Receptor site
Whether they act directly or indirectly
Whether they have dual effects

Question 5

Beta-adrenoceptors normally bind to which of the following:

a) Norepinephrine released by sympathetic adrenergic nerves
b) Circulating Norepinephrine
c) Epinephrine released by sympathetic adrenergic nerves
d) Circulating Epinephrine

Answer 5

a) & d)

Question 6

Beta adrenergic agonist’s positive inotropic effects are mediated by:

Answer 6

Increased cAMP

Question 7

Activation of which of the adrenoreceptors causes bronchodilation?

Answer 7

Beta 2

Question 8

Alpha adrenergic agonist bind to alpha receptors and cause:

Answer 8

Vasoconstriction of both arteries and veins, but more pronounced in the arterioles

Question 9

Which of the following is a result of strict alpha agonism?

a) Reflex tachycardia
b) Reflex Bradycardia
c) Portal HTN
d) Decreased CVP

Answer 9

b)

Note: vasoconstriction can increase BP, therefore trigger baroreceptors resulting in reflex bradycardia