Nokea
Which of the following hormones is responsible for stimulating gallbladder contraction and the release of bile into the small intestine during the intestinal phase of digestion?
- A. Cholecystokinin (CCK)
- B. Secretin
- C. Gastrin
- D. Glucagon
Correct Answer: A
Rationale: CCK, released in response to fats in the duodenum, stimulates gallbladder contraction and bile release for fat digestion.
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Which listed substances are all broken down by the liver?
- A. alcohol, drugs, and progesterone
- B. drugs, adrenaline, and urea
- C. oestrogen, water, and drugs
- D. urea, alcohol, and drugs
Correct Answer: D
Rationale: The liver metabolizes various substances including urea, alcohol, and drugs.
Substances which are not related with hepatic portal circulation :-
- A. Amino acid
- B. Fatty acid
- C. Glucose
- D. Electrolytes
Correct Answer: B
Rationale: Fatty acids are absorbed into lacteals and enter the lymphatic system, not the hepatic portal vein.
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 provides the luminal surface of the intestinal wall its characteristics?
- A. Smooth and slippery due to peritoneum
- B. Smooth and slippery due to mucus from epithelial cells
- C. Rough due to villi
- D. Dry due to serosa
Correct Answer: B
Rationale: The luminal surface is smooth and slippery due to mucus secreted by goblet cells in the mucosa, not the peritoneum, which is external.
Brunner's glands are located in :
- A. Oesophagus
- B. Duodenum
- C. Intestine
- D. Stomach
Correct Answer: B
Rationale: Brunner's glands are specifically found in the duodenum.