What is a function of saliva?
Absorbing fat from ingested food
Breaking food into smaller pieces
Beginning the chemical digestion of carbohydrates
Cleansing the esophagus
The Correct Answer is C
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is {"dropdown-group-1":"A"}
Explanation
Correct answer: Right lung
The right lung occupies the right side of the thoracic cavity, is typically larger and divided into three lobes (superior, middle, inferior), and in the image the circled pulmonary tissue on the subject’s right side corresponds to the right lung.
Correct Answer is C
Explanation
A. Intercalated discs: Structures that connect cardiac cells and permit coordination, but not the term for the group behavior.
B. Chordae tendineae: Tendinous cords of AV valves; unrelated to cell-unit behavior.
C. Functional syncytium: Describes cells acting together as one unit due to electrical coupling.
D. Systole: The contraction phase of the cardiac cycle, not a term for a cell collective.
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