The salivary glands secrete the enzyme
The Correct Answer is {"dropdown-group-1":"B","dropdown-group-2":"B"}
A. lipase; lipids: lingual lipase (from tongue) begins lipid digestion, but major salivary secretion is amylase, not lipase.
B. amylase; carbohydrates: salivary (ptyalin) amylase begins digestion of starches (carbohydrates) into smaller sugars.
C. pepsin; proteins: pepsin is secreted as pepsinogen by the stomach, not salivary glands.
D. sucrase; sucrose: sucrase is a brush-border (intestinal) enzyme, not a major salivary gland secretion.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
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.
Correct Answer is {"dropdown-group-1":"B"}
Explanation
A. Microvilli: Microvilli increase surface area for absorption (common in intestines), not the hallmark of respiratory epithelium
B. Cilia: Respiratory epithelium (pseudostratified ciliated columnar) is equipped with cilia on its free surface to move mucus and trapped particles
C. Keratin: Keratinization occurs in skin epithelium (protective), not in the typical respiratory lining
D. Desmosomes: Desmosomes are cell junctions found in many epithelia but the question asks about free-surface specializations; cilia are the functional free-surface structures in respiratory epithelium
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