Think zone
. Under which conditions is glucose given to a patient by the docto
No food is absorbed in stomach. Why?
We cannot digest cellulose. Why?
Answers
Answer:
Glucose is used to treat very low blood sugar (hypoglycemia), most often in people with diabetes mellitus. Glucose is given by injection to treat insulin shock (low blood sugar caused by using insulin and then not eating a meal or eating enough food afterward).
Usually 95% of absorption takes place in small intestine. However, some nutrients and water are also absorbed in mouth and stomach. The main reason why these organs do not absorb the majority of food is that the food present in these organs is in complex form and is not completely digested.
Humans are unable to digest cellulose because the appropriate enzymes to breakdown the beta acetal linkages are lacking. (More on enzyme digestion in a later chapter.) Undigestible cellulose is the fiber which aids in the smooth working of the intestinal tract. ... No vertebrate can digest cellulose directly.