LEHNE PHARM ADRENERGIC AGONISTS LATEST
100+ QUESTION AND ANSWERS EXAM A+
GUARANTEED
1. Which receptor is primarily responsible for vasoconstriction when
stimulated by adrenergic agonists?
A. β1
B. α1
C. β2
D. D1
Rationale: α1 receptor stimulation causes contraction of vascular smooth muscle,
resulting in vasoconstriction.
2. Activation of β1 receptors primarily produces which effect?
A. Bronchodilation
B. Increased heart rate and contractility
C. Vasodilation of skeletal muscle
D. Miosis
Rationale: β1 receptors are concentrated in the heart and increase cardiac rate
and force of contraction.
3. Which receptor subtype is most closely associated with bronchodilation?
A. α1
B. α2
C. β2
D. β1
Rationale: β2 receptor activation relaxes bronchial smooth muscle, causing
bronchodilation.
4. Epinephrine stimulates which receptor types?
,A. α1 only
B. β receptors only
C. α and β receptors
D. Dopamine receptors only
Rationale: Epinephrine is a nonselective adrenergic agonist that activates α1, α2,
β1, and β2 receptors.
5. Which endogenous catecholamine has the greatest affinity for β2
receptors?
A. Dopamine
B. Epinephrine
C. Phenylephrine
D. Midodrine
Rationale: Epinephrine strongly stimulates β2 receptors, producing
bronchodilation and vasodilation.
6. Phenylephrine is classified as a:
A. β1 agonist
B. β2 agonist
C. Selective α1 agonist
D. Nonselective β agonist
Rationale: Phenylephrine selectively activates α1 receptors and is commonly used
as a decongestant.
7. A common therapeutic use of phenylephrine is:
A. Asthma treatment
B. Nasal decongestion
C. Heart failure treatment
D. Migraine prevention
Rationale: α1-mediated vasoconstriction reduces nasal mucosal swelling.
8. Which adrenergic agonist is most commonly used for anaphylaxis?
, A. Dobutamine
B. Clonidine
C. Epinephrine
D. Phenylephrine
Rationale: Epinephrine reverses bronchoconstriction, hypotension, and edema
associated with anaphylaxis.
9. Dobutamine primarily stimulates:
A. α1 receptors
B. β1 receptors
C. β2 receptors
D. D2 receptors
Rationale: Dobutamine is a selective β1 agonist used to increase cardiac output.
10.Dobutamine is most commonly administered for:
A. Hypertension
B. Asthma
C. Acute heart failure
D. Allergic rhinitis
Rationale: β1 stimulation increases myocardial contractility and cardiac output.
11.Albuterol primarily acts on:
A. α1 receptors
B. β1 receptors
C. β2 receptors
D. D1 receptors
Rationale: Albuterol selectively stimulates β2 receptors in the lungs.
12.The major therapeutic effect of albuterol is:
A. Increased blood pressure
B. Bronchodilation
100+ QUESTION AND ANSWERS EXAM A+
GUARANTEED
1. Which receptor is primarily responsible for vasoconstriction when
stimulated by adrenergic agonists?
A. β1
B. α1
C. β2
D. D1
Rationale: α1 receptor stimulation causes contraction of vascular smooth muscle,
resulting in vasoconstriction.
2. Activation of β1 receptors primarily produces which effect?
A. Bronchodilation
B. Increased heart rate and contractility
C. Vasodilation of skeletal muscle
D. Miosis
Rationale: β1 receptors are concentrated in the heart and increase cardiac rate
and force of contraction.
3. Which receptor subtype is most closely associated with bronchodilation?
A. α1
B. α2
C. β2
D. β1
Rationale: β2 receptor activation relaxes bronchial smooth muscle, causing
bronchodilation.
4. Epinephrine stimulates which receptor types?
,A. α1 only
B. β receptors only
C. α and β receptors
D. Dopamine receptors only
Rationale: Epinephrine is a nonselective adrenergic agonist that activates α1, α2,
β1, and β2 receptors.
5. Which endogenous catecholamine has the greatest affinity for β2
receptors?
A. Dopamine
B. Epinephrine
C. Phenylephrine
D. Midodrine
Rationale: Epinephrine strongly stimulates β2 receptors, producing
bronchodilation and vasodilation.
6. Phenylephrine is classified as a:
A. β1 agonist
B. β2 agonist
C. Selective α1 agonist
D. Nonselective β agonist
Rationale: Phenylephrine selectively activates α1 receptors and is commonly used
as a decongestant.
7. A common therapeutic use of phenylephrine is:
A. Asthma treatment
B. Nasal decongestion
C. Heart failure treatment
D. Migraine prevention
Rationale: α1-mediated vasoconstriction reduces nasal mucosal swelling.
8. Which adrenergic agonist is most commonly used for anaphylaxis?
, A. Dobutamine
B. Clonidine
C. Epinephrine
D. Phenylephrine
Rationale: Epinephrine reverses bronchoconstriction, hypotension, and edema
associated with anaphylaxis.
9. Dobutamine primarily stimulates:
A. α1 receptors
B. β1 receptors
C. β2 receptors
D. D2 receptors
Rationale: Dobutamine is a selective β1 agonist used to increase cardiac output.
10.Dobutamine is most commonly administered for:
A. Hypertension
B. Asthma
C. Acute heart failure
D. Allergic rhinitis
Rationale: β1 stimulation increases myocardial contractility and cardiac output.
11.Albuterol primarily acts on:
A. α1 receptors
B. β1 receptors
C. β2 receptors
D. D1 receptors
Rationale: Albuterol selectively stimulates β2 receptors in the lungs.
12.The major therapeutic effect of albuterol is:
A. Increased blood pressure
B. Bronchodilation
