Movement of Water Out of the Large Intestine is By

Question

Movement of water out of the large intestine is by
A) active transport.
B) cotransport.
C) osmosis.
D) All of the choices are correct.

Accepted Answer

The movement of water out of the large intestine occurs by osmosis, which is the movement of water molecules across a selectively permeable membrane from an area of high water concentration to an area of lower water concentration. This occurs due to the high concentration of solutes (including fecal matter) in the large intestine, which creates a lower concentration of water. As a result, water moves out of the large intestine and into the bloodstream, leading to the formation of solid feces. Active transport and cotransport are not involved in the movement of water out of the large intestine.