This gastric juice component is produced by the chief cells of the gastric glands in an inactive form:
Intrinsic factor
mucus
hydrochloric acid
pepsinogen
The Correct Answer is D
A. Intrinsic factor: intrinsic factor is secreted by parietal cells, not produced as an inactive zymogen by chief cells.
B. mucus: mucus is secreted by mucous cells and is not an inactive enzyme precursor.
C. hydrochloric acid: HCl is secreted by parietal cells as acid, not an inactive enzyme precursor from chief cells.
D. pepsinogen: chief cells secrete pepsinogen, an inactive zymogen that is activated (to pepsin) by HCl.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Absorbing fat from ingested food: saliva does not absorb fat; lipid processing occurs later (emulsification by bile, digestion by lipase).
B. Breaking food into smaller pieces: Incorrect (partly true) -mastication (teeth and jaw) breaks food down; saliva lubricates and moistens but does not mechanically triturate alone.
C. Beginning the chemical digestion of carbohydrates: saliva contains salivary amylase, which begins starch digestion into smaller sugars.
D. Cleansing the esophagus: saliva helps cleanse the mouth and aids swallowing, but it does not “cleanse the esophagus” as a primary function.
Correct Answer is A
Explanation
A. Both antigens A and B: type AB RBCs express both A and B surface antigens.
B. Neither antigens A nor antigens B: that describes type O, not AB.
C. Antigens A only: that describes type A, not AB.
D. Antigens B only: that describes type B, not AB.
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