What is the double effect of saliva on food in humans?
Answer and explanation
Correct answer: Moistening food and starting starch digestion
Saliva has both a physical and a chemical role in digestion. Its water and mucus moisten and lubricate food, making it easier to form a bolus and swallow. Salivary amylase then begins the chemical digestion of starch into simpler sugars in the mouth. Therefore option A correctly gives both effects. Saliva does not convert fat into bile, form blood or urine, make oxygen, or direct food into the lungs.
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What is the correct answer to this question?
Moistening food and starting starch digestion
Why is this the correct answer?
Saliva has both a physical and a chemical role in digestion. Its water and mucus moisten and lubricate food, making it easier to form a bolus and swallow. Salivary amylase then begins the chemical digestion of starch into simpler sugars in the mouth. Therefore option A correctly gives both effects. Saliva does not convert fat into bile, form blood or urine, make oxygen, or direct food into the lungs.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Life Processes.
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