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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 inÂ
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