1. Which of the following drugs belongs to the class of beta blockers?

a) Propranolol

b) Nifedipine

c) Captopril

d) Furosemide

Answer: a) Propranolol. Beta blockers are drugs that block the action of

beta-adrenergic receptors, which are involved in the regulation of heart

rate, blood pressure, and other functions. Propranolol is a non-selective

beta blocker that can affect both beta-1 and beta-2 receptors. Nifedipine

is a calcium channel blocker, captopril is an angiotensin-converting

enzyme inhibitor, and furosemide is a loop diuretic.

Rationale: Beta blockers are used to treat hypertension, angina,

arrhythmias, and other conditions. They can reduce the workload of the

heart and decrease oxygen demand. They can also cause side effects

such as bradycardia, hypotension, bronchoconstriction, and fatigue.

2. What is the mechanism of action of aspirin?

a) Inhibition of cyclooxygenase

b) Activation of opioid receptors

c) Blockade of histamine receptors

d) Stimulation of adrenergic receptors

Answer: a) Inhibition of cyclooxygenase. Aspirin is a non-steroidal antiinflammatory drug (NSAID) that inhibits the enzyme cyclooxygenase

(COX), which is responsible for the synthesis of prostaglandins and

thromboxanes. Prostaglandins and thromboxanes are involved in