MCQ 101:
Which hormone stimulates the gallbladder to release bile?
A) Insulin
B) Glucagon
C) Cholecystokinin
D) Gastrin
Answer: C) Cholecystokinin
Explanation: Cholecystokinin is released in response to fats in the duodenum and stimulates the gallbladder to release bile.
MCQ 102:
Which part of the digestive system is primarily responsible for the mechanical digestion of food?
A) Stomach
B) Small intestine
C) Large intestine
D) Esophagus
Answer: A) Stomach
Explanation: The stomach is primarily responsible for mechanical digestion through churning and mixing of food.
MCQ 103:
What is the function of the pyloric sphincter?
A) Controls the release of bile
B) Prevents backflow into the stomach
C) Regulates the passage of food into the small intestine
D) Secretes digestive enzymes
Answer: C) Regulates the passage of food into the small intestine
Explanation: The pyloric sphincter controls the flow of partially digested food from the stomach to the small intestine.
MCQ 104:
Which vitamin is essential for the synthesis of clotting factors?
A) Vitamin C
B) Vitamin K
C) Vitamin A
D) Vitamin E
Answer: B) Vitamin K
Explanation: Vitamin K is essential for the synthesis of certain clotting factors in the liver.
MCQ 105:
What is the primary site of carbohydrate digestion?
A) Mouth
B) Stomach
C) Small intestine
D) Large intestine
Answer: C) Small intestine
Explanation: Most carbohydrate digestion occurs in the small intestine, where enzymes like amylase act on starches.
MCQ 106:
Which structure in the small intestine increases the surface area for absorption?
A) Microvilli
B) Plicae circulares
C) Villi
D) All of the above
Answer: D) All of the above
Explanation: Microvilli, plicae circulares, and villi all contribute to increasing the surface area for absorption in the small intestine.
MCQ 107:
What is the primary role of gastric acid?
A) To digest carbohydrates
B) To kill pathogens
C) To emulsify fats
D) To neutralize bile
Answer: B) To kill pathogens
Explanation: Gastric acid helps kill pathogens present in food, providing an essential defense mechanism.
MCQ 108:
Which enzyme is responsible for the breakdown of starches?
A) Lactase
B) Sucrase
C) Amylase
D) Pepsin
Answer: C) Amylase
Explanation: Amylase breaks down starches into simpler sugars during digestion.
MCQ 109:
What type of transport is primarily involved in the absorption of glucose in the intestine?
A) Active transport
B) Facilitated diffusion
C) Simple diffusion
D) Osmosis
Answer: A) Active transport
Explanation: Glucose is absorbed through active transport, requiring energy and the presence of sodium ions.
MCQ 110:
Which of the following conditions can result from a deficiency of vitamin B12?
A) Anemia
B) Rickets
C) Night blindness
D) Scorbutic gums
Answer: A) Anemia
Explanation: Vitamin B12 deficiency can lead to megaloblastic anemia, characterized by large, immature red blood cells.
Leave a comment