The chemical and mechanical digestion of carbohydrates begins in which part of the digestion system?
Stomach
Duodenum
Ascending colon
Mouth
The Correct Answer is D
A. Stomach
Some protein digestion occurs here, but carbohydrate digestion is minimal due to acidic pH inhibiting salivary enzymes.
B. Duodenum
Enzymatic digestion continues here, but it does not begin in the duodenum.
C. Ascending colon
No digestion happens here-only water and electrolyte absorption.
D. Mouth
Salivary amylase begins chemical digestion of carbohydrates, while chewing provides mechanical digestion.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Yogurt parfait with honey and granola
Yogurt is an animal product, not vegan.
B. Tofu (soy) stir-fry with quinoa and vegetables
Tofu and quinoa are complete plant-based proteins -ideal for vegans and promote wound healing.
C. Scrambled eggs with whole grain toast
Eggs are not vegan, although a good protein source.
D. Grilled chicken and cottage cheese
Both are animal products, not suitable for a vegan.
Correct Answer is C
Explanation
A. Mouth
Carbohydrate digestion begins here via salivary amylase, but it's minimal and not the main site of absorption.
B. Transverse colon
By this point, most carbs are already absorbed. The colon mainly absorbs water and electrolytes.
C. Duodenum
The duodenum, part of the small intestine, is where pancreatic amylase continues carbohydrate digestion, and absorption of monosaccharides begins.
D. Stomach
The acidic environment inactivates salivary amylase; little to no carb digestion occurs here.
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