Q. Which part of the digestive system is primarily involved in the absorption of water? (2019)
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A.
Stomach
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B.
Small intestine
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C.
Large intestine
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D.
Esophagus
Solution
The large intestine is primarily responsible for the absorption of water and electrolytes.
Correct Answer: C — Large intestine
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Q. Which part of the digestive system is primarily responsible for the absorption of nutrients? (2021)
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A.
Mouth
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B.
Stomach
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C.
Small intestine
-
D.
Large intestine
Solution
The small intestine is the primary site for the absorption of nutrients due to its large surface area and presence of villi.
Correct Answer: C — Small intestine
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Q. Which part of the digestive system is responsible for the absorption of water? (2019)
-
A.
Stomach
-
B.
Small intestine
-
C.
Large intestine
-
D.
Esophagus
Solution
The large intestine is primarily responsible for the absorption of water and electrolytes.
Correct Answer: C — Large intestine
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Q. Which part of the human digestive system is primarily responsible for the absorption of nutrients? (2021)
-
A.
Stomach
-
B.
Small intestine
-
C.
Large intestine
-
D.
Esophagus
Solution
The small intestine is the primary site for nutrient absorption due to its large surface area and presence of villi.
Correct Answer: B — Small intestine
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Q. Which structure increases the surface area for absorption in the small intestine? (2022)
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A.
Villi
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B.
Microvilli
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C.
Plicae circulares
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D.
All of the above
Solution
All of the above structures (villi, microvilli, and plicae circulares) increase the surface area for absorption in the small intestine.
Correct Answer: D — All of the above
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Q. Which structure prevents the backflow of food from the stomach to the esophagus? (2020)
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A.
Pyloric sphincter
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B.
Cardiac sphincter
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C.
Ileocecal valve
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D.
Anal sphincter
Solution
The cardiac sphincter, also known as the lower esophageal sphincter, prevents the backflow of food from the stomach to the esophagus.
Correct Answer: B — Cardiac sphincter
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Q. Which vitamin is primarily absorbed in the ileum of the small intestine? (2023)
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A.
Vitamin A
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B.
Vitamin B12
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C.
Vitamin C
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D.
Vitamin D
Solution
Vitamin B12 is primarily absorbed in the ileum of the small intestine.
Correct Answer: B — Vitamin B12
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Q. Which vitamin is primarily absorbed in the ileum? (2020)
-
A.
Vitamin A
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B.
Vitamin B12
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C.
Vitamin C
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D.
Vitamin D
Solution
Vitamin B12 is primarily absorbed in the ileum of the small intestine.
Correct Answer: B — Vitamin B12
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Q. Which vitamin is primarily absorbed in the small intestine? (2023)
-
A.
Vitamin A
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B.
Vitamin C
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C.
Vitamin B12
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D.
Vitamin K
Solution
Vitamin B12 is primarily absorbed in the small intestine, specifically in the ileum.
Correct Answer: C — Vitamin B12
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