Which statement best distinguishes digestion from absorption?
Correct answer: B. Digestion breaks food into smaller molecules, while absorption transfers them into blood or lymph
- A. Digestion moves nutrients into blood, while absorption breaks food apart
- B. Digestion breaks food into smaller molecules, while absorption transfers them into blood or lymph
- C. Digestion occurs only in the mouth, while absorption occurs only in the stomach
- D. Digestion stores nutrients in cells, while absorption eliminates waste through the anus
Explanation
Digestion is the mechanical and chemical breakdown of food into absorbable molecules. Absorption is the movement of these molecules through the intestinal wall into blood or lymph; assimilation is their subsequent use by body cells.
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About Digestive System
The digestive system covers the structure and functions of the alimentary canal from mouth to anus, along with the liver, gallbladder and pancreas. It explains mechanical and chemical digestion, the action of major enzymes, absorption through intestinal villi, and how digestion differs from absorption and assimilation.
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40 free Digestive System MCQs from Anatomy and Physiology for Nursing, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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