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The veins draining most organs carry blood directly to the heart. However, the veins and lymph vessels that drain the small intestine empty into a vein called the hepatic portal vein that carries the blood directly to the liver. What is the physiological significance of this anatomical arrangement?
a. The arrangement enables the liver to efficiently process nutrient molecules, such as converting excess glucose into glycogen for storage.
b. Insulin can be secreted from liver cells in direct proportion to fuel molecules absorbed in the small intestine.
c. Starch and glycogen molecules absorbed from the intestine can be broken down to glucose in the liver.
d. Ghrelin secretion by liver cells can be effectively suppressed following a meal.

2007-03-04 08:24:39 · 4 answers · asked by Anonymous in Science & Mathematics Biology

4 answers

A is correct. B is incorrect since insulin is secreted by the pancreas. C is in correct since we do not glycogen from food it is produced by the liver for storage, D is incorrect since ghrelin is a hormone produced by the stomach lining.

2007-03-04 08:34:19 · answer #1 · answered by ATP-Man 7 · 0 0

A is the answer.

insulin is secreted by the beta cells of the pancreas
gylcogen is not normally present in the intestines
starch is normally hydrolized in the mouth with the aid of salivary amylase and cannot be absorbed otherwise
ghrelin is secreted by the stomach

2007-03-04 20:10:27 · answer #2 · answered by zeto 3 · 0 0

The answer is A.
Insulin is secreted by the pancreas.
Starch and glycogen is broken down in mouth and stomach.
Ghrelin is secreted in the stomach.

2007-03-04 17:35:50 · answer #3 · answered by Anonymous · 0 0

a

2007-03-04 16:37:47 · answer #4 · answered by the vet 4 · 0 0

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