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Gastric lipase is secreted by -
- A. Stomach
- B. Pancreas
- C. Liver
- D. Ileum
Correct Answer: A
Rationale: Gastric lipase is secreted by the stomach to initiate fat digestion.
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pH of stomach in human is about-
- A. 7
- B. 1.8
- C. 8
- D. 11
Correct Answer: B
Rationale: The stomach's pH is approximately 1.8 due to the secretion of hydrochloric acid, creating an acidic environment for digestion.
The muscular tube that extends from the mouth to the anus is called:
- A. the gullet
- B. the intestine
- C. the colon
- D. the alimentary canal
Correct Answer: D
Rationale: The alimentary canal, also known as the digestive tract, is the continuous muscular tube extending from the mouth to the anus, encompassing all digestive organs.
Cheek teeth are-
- A. Incisors and Canines
- B. Canines and Premolars
- C. Premolars and Molar
- D. Canines and Molars
Correct Answer: C
Rationale: Cheek teeth refer to premolars and molars, located in the back of the mouth for grinding food.
A gastrointestinal tumor involving villi and plicae circulares might interfere with:
- A. deglutition
- B. absorption
- C. peristalsis
- D. defecation
Correct Answer: B
Rationale: Villi and plicae circulares increase the surface area for absorption in the small intestine. A tumor affecting these structures would impair absorption.
Amylase in saliva initiates digestion of:
- A. lipids
- B. proteins
- C. fats
- D. carbohydrates
Correct Answer: D
Rationale: Salivary amylase breaks down carbohydrates into simpler sugars.