Nokea
Which features make a villus well adapted for absorbing amino acids from the ileum?
- A. large surface area, thin walls, lacteal
- B. large surface area: volume ratio, good blood supply, thin walls
- C. small surface area, good blood supply, lacteal
- D. small surface area: volume ratio, good blood supply, thin walls
Correct Answer: B
Rationale: Villi have a large surface area to volume ratio, good blood supply, and thin walls, facilitating efficient absorption of nutrients such as amino acids.
You may also like to solve these questions
Which of the following is not a function of saliva?
- A. to initiate protein digestion
- B. to aid in cleansing the teeth
- C. to lubricate the pharynx
- D. to assist in formation of the bolus
Correct Answer: A
Rationale: Saliva contains amylase for carbohydrate digestion, but it does not initiate protein digestion.
Which of the following vitamins helps in the maturation of red blood cells?
- A. Vitamin D.
- B. Vitamin A.
- C. Vitamin B12.
- D. Vitamin B.
Correct Answer: C
Rationale: Vitamin B12 is essential for the maturation of red blood cells and DNA synthesis.
Which of the following enzyme is secreted by pancreas -
- A. Maltase
- B. Trypsin
- C. Rennin
- D. Lactase
Correct Answer: B
Rationale: Trypsin, a proteolytic enzyme, is secreted by the pancreas.
What happens during the gastric phase of digestion?
- A. Food is ingested
- B. Stomach mixes food with gastric juice to form chyme
- C. Nutrients are absorbed in the intestine
- D. Bile emulsifies fats
Correct Answer: B
Rationale: The gastric phase involves the stomach churning food with gastric secretions (e.g., HCl, pepsin) to form chyme.
The small intestine is held to the posterior abdominal wall by the:
- A. mesentery
- B. falciform ligament
- C. greater omentum
- D. lesser omentum
Correct Answer: A
Rationale: The mesentery supports and anchors the small intestine to the posterior abdominal wall.