Nokea
Carboxypeptidase requires _______ for its activity
- A. Copper
- B. Niacin
- C. Iron
- D. Zn
Correct Answer: D
Rationale: Carboxypeptidase is a zinc-dependent enzyme that breaks down proteins into amino acids.
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Lamina propria of hard palate is formed by:
- A. Loose areolar connective tissue.
- B. Adipose tissue
- C. Periostium of the bone above
- D. Mucoid connective tissue.
Correct Answer: C
Rationale: The lamina propria of the hard palate is directly continuous with the periosteum of the underlying bone, providing a firm attachment. Loose areolar tissue is more typical in softer mucosal areas.
In pancreas, pancreatic juice and hormone are secreted by-
- A. Same cells
- B. Different Cells
- C. Same cells at different times
- D. None of these.
Correct Answer: B
Rationale: Pancreatic juice (exocrine) is secreted by acinar cells, while hormones (endocrine) are secreted by Islets of Langerhans.
Which of the following parts of the digestive system has the most important role in nutrient absorption?
- A. stomach
- B. esophagus
- C. large intestines
- D. small intestines
Correct Answer: D
Rationale: The small intestine is the primary site for nutrient absorption due to its large surface area and specialized structures like villi and microvilli.
The pylorus is best described as the:
- A. Area of the stomach that accepts food from the esophagus
- B. Valve between the ileum and the cecum
- C. Terminal portion of the large intestine
- D. Area of the stomach that empties into the small intestine
Correct Answer: D
Rationale: The pylorus is the lower part of the stomach that connects to the duodenum.
Nutrients like calcium and zinc are often referred to as
- A. proteins
- B. minerals
- C. fats
- D. vitamins
Correct Answer: B
Rationale: Calcium and zinc are classified as minerals, essential inorganic nutrients.