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Digestion and absorption are essential processes in the human digestive system. Digestion involves the breakdown of ingested food into smaller, more easily absorbable molecules through mechanical and chemical processes. This occurs in the mouth, stomach, and small intestine. Absorption refers to the uptake of nutrients, water, and other important substances from the digested food into the bloodstream through the lining of the small intestine. These nutrients are then transported to cells throughout the body to support growth, energy production, and overall functioning.
Here are some MCQs related to Digestion and Absorption for the NEET exam:
1. Where does the majority of nutrient absorption occur in the digestive system?
a. Mouth
b. Stomach
c. Small intestine
d. Large intestine
Answer: c. Small intestine
2. Which enzyme is responsible for breaking down carbohydrates in the mouth?
a. Amylase
b. Protease
c. Lipase
d. Pepsin
Answer: a. Amylase
3. What is the function of bile in digestion?
a. Emulsify fats
b. Break down proteins
c. Break down carbohydrates
d. None of the above
Answer: a. Emulsify fats
4. Which hormone stimulates the release of digestive enzymes from the pancreas?
a. Insulin
b. Glucagon
c. Secretin
d. Cholecystokinin (CCK)
Answer: c. Secretin
5. What is the term for the wave-like muscular contractions that move food through the digestive system?
a. Peristalsis
b. Segmentation
c. Churning
d. None of the above
Answer: a. Peristalsis
6. Which of the following is not a component of saliva?
a. Water
b. Amylase
c. Mucus
d. Hydrochloric acid
Answer: d. Hydrochloric acid
7. What is the role of hydrochloric acid in the stomach?
a. Break down carbohydrates
b. Break down proteins
c. Emulsify fats
d. None of the above
Answer: b. Break down proteins
8. Which enzyme is responsible for breaking down proteins in the stomach?
a. Amylase
b. Protease
c. Lipase
d. Pepsin
Answer: d. Pepsin
9. Which of the following is not a function of the large intestine?
a. Absorption of water
b. Absorption of nutrients
c. Formation of feces
d. None of the above
Answer: b. Absorption of nutrients
10. What is the term for the semi-solid mixture of food and digestive juices that are formed in the stomach?
a. Chyme
b. Bolus
c. Feces
d. None of the above
Answer: a. Chyme
