Which of the following structures most is responsible for determining pulmonary resistance?

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Medical Surgical Endocrine Practice Quiz Questions

Question 1 of 5

Which of the following structures most is responsible for determining pulmonary resistance?

Correct Answer: D

Rationale: Bronchioles regulate airflow resistance via smooth muscle constriction/dilation.

Question 2 of 5

The most common site of esophageal cancers are found in the:

Correct Answer: B

Rationale: The middle third of the esophagus is the most common site for esophageal squamous cell carcinoma, which historically predominates, though adenocarcinoma in the lower third is increasing in Western populations due to Barrett's esophagus.

Question 3 of 5

Histamine stimulation produces a large increment in secretion over the basal rate

Correct Answer: B

Rationale: In Zollinger-Ellison syndrome, histamine stimulation produces minimal additional secretion because basal rates are already maximally elevated by gastrin.

Question 4 of 5

Gallstones are statistically associated in a positive way with all of the following except:

Correct Answer: D

Rationale: Gallstones are linked to age, female sex (especially premenopausal), obesity, and diabetes; 'none of these' is incorrect as all are risk factors.

Question 5 of 5

Spider fingers, high arched palate, aortic abnormalities and ectopic lenses are seen in what syndrome:

Correct Answer: C

Rationale: Marfan syndrome features arachnodactyly, high arched palate, aortic defects, and lens dislocation due to fibrillin-1 mutation.

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