All is true regarding the unique shape of red blood cells except:

Questions 80

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Medical Surgical Endocrine Practice Quiz Questions

Question 1 of 5

All is true regarding the unique shape of red blood cells except:

Correct Answer: D

Rationale: All are true: biconcave shape aids gas exchange, flexibility, and rouleaux formation.

Question 2 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 3 of 5

The primary role of the phosphate buffer system is to?

Correct Answer: C

Rationale: Phosphate buffers metabolic/fixed acids in blood and urine.

Question 4 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 5 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.

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