The Movement of Molecules Out of the Digestive Tract into Circulation

Question

The movement of molecules out of the digestive tract into circulation or the lymphatic system is
A) secretion.
B) peristalsis.
C) chemical digestion.
D) absorption.

Accepted Answer

Absorption refers to the movement of molecules from the digestive tract into circulation or the lymphatic system. Secretion refers to the release of substances such as enzymes or hormones into the digestive tract. Peristalsis refers to the muscular contractions that propel food through the digestive tract. Chemical digestion refers to the breakdown of large molecules into smaller ones by enzymes or other chemicals.