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HESI RN · HESI Pharmacology · Drugs and the Peripheral Nervous System

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Showing all 5 practice questions with expert explanatory rationales.

Question 1 of 5

Which of the following mydriatics has the fastest and briefest action?

A. Atropine

B. Homatropine

C. Tropicamide

D. Cyclopentolate

Correct Answer: Tropicamide

Question 2 of 5

Agents that block neuromuscular transmission of acetyl choline acts via

A. Inhibiting acetyl choline synthesis

B. Inhibiting acetyl choline release

C. Inhibiting post-synaptic action of acetyl choline

D. All of the above

Correct Answer: Inhibiting post-synaptic action of acetyl choline

Question 3 of 5

During sympathetic activation, what effect does it have on the respiratory system?

A. Increased breathing rate

B. Decreased breathing rate

C. No effect on breathing

D. Constriction of air ways

Correct Answer: Increased breathing rate

Question 4 of 5

Which of the following indirectly acting sympathomimetics is an uptake-1 inhibitor?

A. Tyramine

B. Amphetamine

C. Ephedrine

D. All of the above

Correct Answer: Amphetamine

Question 5 of 5

The biochemical mechanism of action of digitalis is associated with

A. A decrease in calcium uptake by the sarcoplasmic reticulum

B. An increase in ATP synthesis

C. A modification of the actin molecule

D. An increase in systolic intracellular calcium levels

Correct Answer: An increase in systolic intracellular calcium levels

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