AP BIOLOGY

ANIMAL PHYSIOLOGY

DIGESTION IN HUMANS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
An individual suffers from ulcer in the ileum. A part of his ileum has been removed. What is the effect to the product of starch digestion?
A
The amount of glucose increase
B
The amount of starch increases
C
The amount of maltose increases
D
The amount of sucrose increases
Explanation: 

Detailed explanation-1: -Digestion and absorption of carbohydrates Amylase hydrolyzes starch, with the primary end products being maltose, maltotriose, and a-dextrins, although some glucose is also produced.

Detailed explanation-2: -Only about five percent of starches are broken down in the mouth. (This is a good thing as more glucose in the mouth would lead to more tooth decay.) When carbohydrates reach the stomach no further chemical breakdown occurs because the amylase enzyme does not function in the acidic conditions of the stomach.

Detailed explanation-3: -During digestion, starches and sugars are broken down both mechanically (e.g. through chewing) and chemically (e.g. by enzymes) into the single units glucose, fructose, and/or galactose, which are absorbed into the blood stream and transported for use as energy throughout the body.

Detailed explanation-4: -The walls of the small intestine are lined with a dense mucosa with many glands that both secrete and absorb. In the jejunum and the ileum, the mucosa secretes small amounts of digestive enzymes and lubricating mucus while absorbing nutrients from your food.

There is 1 question to complete.