Carbohydrates, lipids, and proteins are completely digested in which region of the GI (gastrointestinal) tract?
Stomach
Colon
Duodenum
Jejunum
The Correct Answer is C
A. Stomach: Begins protein digestion (pepsin) but does not complete digestion of carbs and most lipids.
B. Colon: Primarily involved in water absorption and fecal formation, not extensive enzymatic digestion of macronutrients.
C. Duodenum: Receives bile and pancreatic enzymes; major site where carbohydrates, lipids, and proteins are enzymatically broken down into absorbable units.
D. Jejunum: Major site of nutrient absorption after digestion, but the initial/completion of enzymatic digestion occurs in the duodenum.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. pH 7.40: Near normal arterial blood pH; hydrogen ion concentration is lower than at more acidic pH values.
B. pH 7.35: Slightly more acidic than 7.40, so hydrogen ion concentration is higher than at 7.40.
C. pH 7.45: Slightly more alkaline than 7.40, so hydrogen ion concentration is lower than at 7.40.
D. pH 7.28: The lowest pH listed (most acidic), therefore it has the highest hydrogen ion (H⁺) concentration.
Correct Answer is B
Explanation
A. Athlete’s foot: Caused by dermatophyte fungi (tinea pedis), so this is a fungal infection rather than a bacterial one.
B. Gonorrhea: Caused by the bacterium Neisseria gonorrhoeae, so this example is bacterial.
C. HIV: Caused by the human immunodeficiency virus, making it a viral infection.
D. Tapeworm: A parasitic infection caused by a helminth (cestode), not a bacterium.
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