A nurse is caring for a client who is prescribed ciprofloxacin for bacteremia.What is the mechanism of action for this medication?

This medication is bactericidal due to inhibition of an enzyme necessary for DNA replication.

This medication accelerates bacterial growth.

This medication is a diuretic that works on the distal tubule of the nephron.

This medication is a beta-blocker that blocks beta-2 receptors, which results in a lower heart rate and blood pressure.

Answer and Explanation

The Correct Answer is A

Choice A rationale

Ciprofloxacin is a bactericidal antibiotic that works by inhibiting DNA gyrase, an enzyme necessary for DNA replication in bacteria. This prevents bacterial cells from replicating and ultimately leads to their death.

Choice B rationale

Ciprofloxacin does not accelerate bacterial growth; instead, it inhibits growth by preventing DNA replication.

Choice C rationale

Ciprofloxacin is not a diuretic. Diuretics work on the kidneys to increase urine production, but ciprofloxacin targets bacterial DNA replication.

Choice D rationale

Ciprofloxacin is not a beta-blocker and does not lower heart rate or blood pressure. Beta-blockers work by blocking beta-adrenergic receptors in the heart.

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Correct Answer is D

Explanation

Choice A rationale

Tumor enhancer genes are not typically a recognized category in cancer genetics. Proto-oncogenes and DNA repair genes are relevant to cancer development.

Choice B rationale

This choice is incorrect as there are genes like proto-oncogenes, tumor suppressor genes, and DNA repair genes that play roles in cancer.

Choice C rationale

This choice is partially correct but incomplete without including DNA repair genes, which are also crucial in cancer prevention.

Choice D rationale

This choice is correct as proto-oncogenes can become oncogenes, tumor suppressor genes prevent uncontrolled cell growth, and DNA repair genes fix DNA mutations that can lead to cancer.

A. Asthma. B. Cough suppression. C. Reduction of pain. D. Treatment of allergic rhinitis.

Correct Answer is B

Explanation

Choice A rationale

Dextromethorphan is not used for asthma. Asthma treatment typically involves bronchodilators and anti-inflammatory medications.

Choice B rationale

Dextromethorphan is an antitussive used to suppress coughing. It acts on the cough center in the brain to reduce the urge to cough.

Choice C rationale

This medication is not used for pain reduction. Pain management usually involves analgesics or anti-inflammatory drugs.

Choice D rationale

Dextromethorphan is not indicated for allergic rhinitis. Allergic rhinitis treatments typically include antihistamines or nasal corticosteroids.

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A nurse is caring for a client who is prescribed ciprofloxacin for bacteremia.What is the mechanism of action for this medication?

Nursing Test Bank

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