The stomach has the ability to absorb: 2+

Correct Answer: C

Rationale: Rationale: The stomach primarily functions in digestion and does not have significant absorption capabilities. Glucose is absorbed in the small intestine through specialized transport mechanisms. Choices A (Ca) and D (aromatic amino acids) are primarily absorbed in the small intestine as well. Alcohol is absorbed in the stomach to a small extent, but the majority is absorbed in the small intestine. Therefore, the correct answer is C (Glucose) as it is primarily absorbed in the small intestine, not the stomach.

Correct Answer: D

Rationale: The correct answer is D: appendix. Carcinoid tumors in the appendix are considered the most benign due to their slow growth rate and low metastatic potential. The appendix is a small organ with limited blood supply, which restricts tumor growth and dissemination. Other choices (A: stomach, B: small intestine, C: rectum) have higher malignant potential due to larger size, increased blood supply, and higher likelihood of metastasis. Therefore, the appendix is the most benign location for carcinoid tumors.

Correct Answer: A

Rationale: Rationale: A) Lactase, maltase, and sucrase enzymes are secreted in the small intestine to break down lactose, maltose, and sucrose into simpler sugars for absorption. B) Glucose and amino acids absorption occurs via active transport, not simple diffusion. C) Bile pigments are not completely absorbed; they aid in fat digestion. D) Fat absorption is primarily a passive process, with some active transport involved, but it does not require a Na co-transport system.

Correct Answer: C

Rationale: Intrinsic factor is required for the absorption of Vitamin B12 in the upper ileum. It binds to Vitamin B12, allowing it to be absorbed. Vitamin D (Choice A) is absorbed in the small intestine but does not require intrinsic factor. Amino acids (Choice B) are absorbed in the small intestine but not dependent on intrinsic factor. Choice D is incorrect as intrinsic factor is specifically necessary for the absorption of Vitamin B12.

Correct Answer: B

Rationale: The correct answer is B: Breakdown of carbohydrates. Amylase is an enzyme that specifically targets and breaks down carbohydrates like starch into simpler sugars like glucose. This breakdown process starts in the mouth during chewing and continues in the small intestine. Amylase plays a crucial role in the digestion of carbohydrates, facilitating their absorption by the body. Incorrect choices: A: Breakdown of proteins - Proteins are broken down by enzymes like pepsin and trypsin, not by amylase. C: Breakdown of fats - Fats are broken down by lipase enzymes, not by amylase. D: Absorption of water - Water absorption primarily occurs in the large intestine and is not a function of amylase in digestion.