Which secretory cell of the stomach, shown in the following image, secretes pepsinogen?
Parietal cell
Mucous neck cell
Chief cell
Enteroendocrine cell
The Correct Answer is C
A. Parietal Cell: Parietal cells are responsible for secreting hydrochloric acid (HCl) and intrinsic factor, not pepsinogen. HCl activates pepsinogen into pepsin.
B. Mucous Neck Cell: Mucous neck cells secrete mucus to protect the gastric lining but do not secrete pepsinogen.
C. Chief Cell: Chief cells (also known as zymogenic cells) are specialized cells in the stomach that secrete pepsinogen, the inactive precursor of the digestive enzyme pepsin.
D. Enteroendocrine Cell: Enteroendocrine cells secrete hormones like gastrin, which regulates digestive processes, but they do not secrete pepsinogen.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Calcium: Calcium reabsorption primarily occurs in the distal convoluted tubule, not the loop of Henle.
B. Drugs: Drug secretion mainly happens in the proximal convoluted tubule.
C. Urea: Urea is secreted by the loop of Henle, especially in the thin descending limb, as part of the concentration of urine.
D. Bicarbonate ions: Bicarbonate is reabsorbed mainly in the proximal convoluted tubule, not secreted by the loop of Henle.
Correct Answer is C
Explanation
A. Eosinophil cell: Eosinophils are granular leukocytes involved in allergic reactions and parasitic infections.
B. Polymorphonuclear cell: This refers to neutrophils, which are granular leukocytes with multi-lobed nuclei.
C. Monocyte cell: Monocytes are agranular leukocytes that can differentiate into macrophages and are involved in phagocytosis.
D. Basophil cell: Basophils are also granular leukocytes involved in immune responses and releasing histamine.
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