Which of the following is not a function of gastric hydrochloric acid (HCI)?
Destroy ingested pathogens
Convert Fe3+ to Fe2+
Emulsify lipids
Activate pepsinogen to pepsin
The Correct Answer is C
A. Destroy ingested pathogens: HCl in the stomach helps destroy ingested pathogens, providing a first line of defense against infections. Therefore, this is a correct function of HCl.
B. Convert Fe3+ to Fe2+: HCl aids in the conversion of iron from its ferric (Fe3+) to ferrous (Fe2+) form, which is more easily absorbed in the intestine. Therefore, this is a correct function of HCl.
C. Emulsify lipids: Emulsification of lipids is the function of bile, not hydrochloric acid. HCl does not emulsify lipids. This is the correct answer.
D. Activate pepsinogen to pepsin: HCl activates pepsinogen, converting it to the active enzyme pepsin, which is essential for protein digestion in the stomach. Therefore, this is a correct function of HCl.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Corpuscle: The corpuscle refers to the glomerulus and Bowman's capsule, not the medial concavity of the kidney.
B. Cortex: The cortex is the outer region of the kidney, not the medial concavity.
C. Medulla: The medulla refers to the inner part of the kidney but not specifically the medial concavity.
D. Hilum: The hilum is the medial concavity of the kidney where blood vessels, nerves, and the ureter enter and exit.
Correct Answer is A
Explanation
A. Renal corpuscle: Blood plasma is filtered in the renal corpuscle, which includes the glomerulus and Bowman's capsule.
B. Renal capsule: The renal capsule is the outer protective layer of the kidney and does not filter blood plasma.
C. Renal tubule: The renal tubule is involved in reabsorption and secretion, not in the initial filtration of blood plasma.
D. Renal column: The renal column is a structural part of the kidney, not involved in filtering blood plasma.
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