What is secreted by the parietal cells of gastric glands?
Pepsinogen
Hydrochloric acid
Mucus
Pepsin
The Correct Answer is B
A. Pepsinogen: pepsinogen is secreted by chief cells, not parietal cells.
B. Hydrochloric acid: parietal cells secrete HCl, which acidifies the stomach and helps activate pepsinogen.
C. Mucus: mucus is secreted by mucous (surface) cells to protect the gastric epithelium, not by parietal cells.
D. Pepsin: pepsin is the active protease formed from pepsinogen by HCl; parietal cells secrete HCl, not active pepsin.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Inflammation: inflammation causes vasodilation and increased capillary permeability so immune cells and plasma components reach the injured/infected tissue.
B. Activation of NK cells: NK cell activation is an innate cytotoxic response against infected or malignant cells but does not itself describe the vascular changes listed.
C. Complement activation: complement promotes opsonization, chemotaxis, and membrane attack, but the described vasodilation/permeability hallmark is inflammation.
D. Activation of mononuclear phagocytic system: activation of macrophages/monocytes contributes to defense and cleanup, but the vascular response described is specifically the inflammatory process.
Correct Answer is {"dropdown-group-1":"A"}
Explanation
Correct answer: Tricuspid valve
The X marks the tricuspid valve, the atrioventricular valve between the right atrium and right ventricle composed of three cusps.
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