Ondansetron blocks emetogenic impulses at the following site(s).

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Gastrointestinal drug Questions

Question 1 of 5

Ondansetron blocks emetogenic impulses at the following site(s).

A. Vagal afferents in intestines B. Nucleus tractus solitarius C. Chemoreceptor trigger zone D. All of the above

Correct Answer: D

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Question 2 of 5

What is true of acid control therapy with H₂ blockers?

A. It generally heals duodenal ulcers faster than gastric ulcers B. It checks bleeding in case of bleeding peptic ulcer C. It prevents gastroesophageal reflux D. Both (a) and (b)

Correct Answer: A

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Question 3 of 5

The following is a noncompetitive antagonist at the gastric parietal cell H₂ receptor.

A. Cimetidine B. Loxatidine C. Roxatidine D. Rantidine

Correct Answer: B

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Question 4 of 5

Ranitidine differs from cimetidine in the following manner.

A. It is less potent B. It is shorter acting C. It does not have antiandrogenic action D. It produces more CNS side effects

Correct Answer: C

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Question 5 of 5

Omeprazole exerts practically no other action except inhibition of gastric acid secretion because

A. In transforms into the active cationic forms only in the acidic pH of the gastric juice B. Its active forms have selective affinity for the Hâº Kâº ATP ase located in the apical canaliculi of gastric parietal cells C. Its cationic forms are unable to diffuse out from the gastric parietal cell canaliculi D. All of the above

Correct Answer: D

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

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