The Physiology Instructor Is Discussing the GI System with the Pre-Nursing

Multiple Choice

The physiology instructor is discussing the GI system with the pre-nursing class. What should the instructor describe as a major function of the GI tract?

A) The breakdown of food particles into cell form for digestion
B) The maintenance of fluid and acid-base balance
C) The absorption into the bloodstream of nutrient molecules produced by digestion
D) The control of absorption and elimination of electrolytes