Which of the following is not a function of gastric hydrochloric acid (HCI)?
Destroy ingested pathogens
Convert Fe3+ to Fe2+
Emulsify lipids
Activate pepsinogen to pepsin
The Correct Answer is C
A. Destroy ingested pathogens: HCl in the stomach helps destroy ingested pathogens, providing a first line of defense against infections. Therefore, this is a correct function of HCl.
B. Convert Fe3+ to Fe2+: HCl aids in the conversion of iron from its ferric (Fe3+) to ferrous (Fe2+) form, which is more easily absorbed in the intestine. Therefore, this is a correct function of HCl.
C. Emulsify lipids: Emulsification of lipids is the function of bile, not hydrochloric acid. HCl does not emulsify lipids. This is the correct answer.
D. Activate pepsinogen to pepsin: HCl activates pepsinogen, converting it to the active enzyme pepsin, which is essential for protein digestion in the stomach. Therefore, this is a correct function of HCl.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Small intestine is the primary site of nutrient absorption. The majority of digestion and absorption of nutrients such as carbohydrates, proteins, and fats occurs in the small intestine, particularly in the duodenum and jejunum.
B. Pancreas secretes digestive enzymes into the small intestine but does not absorb nutrients itself.
C. Stomach plays a role in the digestion of proteins and the mechanical breakdown of food, but it absorbs very few nutrients, primarily alcohol and some drugs.
D. Large intestine absorbs water and electrolytes, but it is not the major site of nutrient absorption. Most nutrients are absorbed before food reaches the large intestine.
Correct Answer is False
Explanation
The liver is indeed the largest gland in the human body, weighing about 1.5 kilograms in an average adult. It performs numerous vital functions, including detoxification, protein synthesis, and the production of biochemicals necessary for digestion (e.g., bile).
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