NEET BIOLOGY

HUMAN PHYSIOLOGY

BREATHING AND RESPIRATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
In which of the following parts of the alimentary canal is starch MAINLY digested?I. MouthII. StomachIII. Small intestineIV. Large intestine
A
II only
B
I and III
C
I and II
D
I, II, and IV
Explanation: 

Detailed explanation-1: -The digestion of starch begins with salivary amylase, but this activity is much less important than that of pancreatic amylase in the small intestine. Amylase hydrolyzes starch, with the primary end products being maltose, maltotriose, and a-dextrins, although some glucose is also produced.

Detailed explanation-2: -In the small intestine, from 47 to 88% of the presented starch is digested, while in the large intestine, 33 to 62% of the presented starch is digested.

Detailed explanation-3: -Starch apparently digested in the large intestine ranges from 44 to 46% of starch entering the large intestine. Approximately 70% of starch digested in the small intestine appears as glucose in the bloodstream.

Detailed explanation-4: -Starch is digested in the mouth, stomach and small intestine. Enzyme responsible for starch digestion is carbohydrase enzyme and amylase. These enzymes are present in saliva. If we start chewing any food material then it will break down to sugar and it begins to taste sweat.

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