Nokea
Which is the longest organ of digestive system in human body?
- A. Pancreatic duct
- B. Small intestine
- C. Large intestine
- D. Esophagus
Correct Answer: B
Rationale: The small intestine is the longest part of the digestive system, measuring about 7 meters (22 feet). Its main functions are to complete the digestion of food and to absorb nutrients.
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Na+ and other carrier ions facilitate absorption of
- A. Amino acids and fructose
- B. Fatty acids and glycerol
- C. Fatty acids and glucose
- D. Amino acids and glucose
Correct Answer: D
Rationale: Sodium ions (Na+) facilitate the absorption of amino acids and glucose through symport mechanisms.
A patient presents with persistent bloating, gas, and diarrhea after consuming dairy products. Which of the following is the most likely cause of these symptoms?
- A. Impaired carbohydrate digestion
- B. Impaired protein digestion
- C. Impaired fat digestion
- D. Impaired lactose digestion
Correct Answer: D
Rationale: Lactose intolerance, due to lactase deficiency, leads to impaired lactose digestion, causing bloating, gas, and diarrhea after dairy consumption.
In pancreas, pancreatic juice and hormone are secreted by-
- A. Islets of Langerhans
- B. Cells of Acini and Islets of Langerhans respectively
- C. Islets of Langerhans and cells of Acini respectively
- D. None of these.
Correct Answer: B
Rationale: Pancreatic juice is secreted by acinar cells, and hormones by Islets of Langerhans.
The contraction and expansion of the walls of food pipe is called movement.
- A. Peristalsis
- B. Gastric
- C. Oscillatory
- D. Diastolic
Correct Answer: A
Rationale: Peristalsis is a type of wave-like movement occurring in the alimentary canal which involves contraction and relaxation of the muscles. It begins in the esophagus and helps to move the food along the alimentary canal for the process of digestion.
Which type of digestion breaks down pieces of food into small molecules?
- A. chemical digestion
- B. peristalsis digestion
- C. mechanical digestion
- D. absorption digestion
Correct Answer: A
Rationale: Chemical digestion uses enzymes to break food into small molecules.