Digestive System — Practice Quiz
ICSE · Class 9 · Biology
Try a 4-question quiz on Digestive System for ICSE Class 9 Biology: tap an answer to check it and see why. 45 questions in the full chapter test.
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Quick Quiz: Digestive System
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How many teeth does a normal adult human have?
Which enzyme in saliva helps digest starch?
The hardest substance in the human body is:
Peristalsis is:
Sample Questions
Which of the following are functions of the liver?
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Produces bile, Stores glycogen, Detoxifies harmful substances, Destroys old red blood cells
The liver has many functions including bile production, glycogen storage, detoxification, and destroying old red blood cells. It does not produce gastric juice - that's done by the stomach lining.
Which parts of the digestive system produce enzymes?
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Salivary glands, Stomach, Pancreas, Small intestine
Salivary glands produce ptyalin, stomach produces pepsin, pancreas produces multiple enzymes, and small intestine produces various enzymes. The large intestine produces no enzymes.
The gastric juice is:
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Acidic
Gastric juice is highly acidic due to the presence of hydrochloric acid (HCl). This acid kills germs and activates pepsin enzyme.
Villi are found in:
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Small intestine
Villi are finger-like projections found in the inner lining of the small intestine (particularly the ileum). They increase the surface area for better absorption of nutrients.
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