AP BIOLOGY

ANIMAL PHYSIOLOGY

DIGESTION IN HUMANS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Excess water is re-absorbed from undigested food by this ____
A
large intestine
B
small intestine
C
appendix
D
stomach
Explanation: 

Detailed explanation-1: -The large intestine’s main job is to remove water from the undigested matter and form solid waste (poop) to be excreted. The large intestine has three parts: The cecum (pronounced: SEE-kum) is the beginning of the large intestine.

Detailed explanation-2: -The goblet cells consume excess water from the undigested food residues in the large intestine.

Detailed explanation-3: -Water is reabsorbed in the colon after undigested food enters it from the small intestine. Waste is moved through the colon by peristaltic movements of the muscle and is stored in the rectum.

Detailed explanation-4: -The large intestine functions to absorb any excess water from the material it receives from the small intestine. This also involves the collection of electrolytes, which move with water. Thus, the large intestine works to preserve and absorb water and electrolytes that were not absorbed by previous digestive organs.

Detailed explanation-5: -The role of the ascending colon is to absorb the remaining water and other key nutrients from the indigestible material, solidifying it to form stool.

There is 1 question to complete.