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Hydrochloric acid (HCI) is secreted from?

A.

chief

B.

parietal

C.

mucous

D.

regenerative (stem)

Answer and Explanation

The Correct Answer is B

A. Chief cells secrete pepsinogen, not HCl.

B. Parietal cells in the stomach lining are responsible for secreting hydrochloric acid (HCl). This acid is crucial for digestion and killing pathogens.

C. Mucous cells secrete mucus, which protects the stomach lining from the acidic environment. They do not secrete HCl.

D. Regenerative (stem) cells are involved in the renewal of the stomach lining, but they do not secrete HCl.


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Related Questions

Correct Answer is C

Explanation

A. Fundus is the upper part of the stomach, which does not regulate the flow of contents to the duodenum.

B. Gastric rugae are folds in the stomach lining that allow for expansion but do not regulate the flow of contents to the duodenum.

C. Pyloric sphincter controls the flow of partially digested food (chyme) from the stomach into the duodenum.

D. Antrum is the lower portion of the stomach that helps in mixing and grinding food but does not directly regulate its flow to the duodenum.

Correct Answer is C

Explanation

A. Lactate is produced during anaerobic metabolism (when oxygen is scarce) as a byproduct of glycolysis, but it is not the direct product of glycolysis itself.

B. Carbon dioxide is a byproduct of cellular respiration, specifically during the Krebs cycle, not glycolysis.

C. Pyruvate is the end product of glycolysis, where glucose is broken down into two molecules of pyruvate.

D. Acetyl-CoA is formed from pyruvate during the transition step before the Krebs cycle, not directly from glycolysis.

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