Question

Which of the following functions do bacteria in the small intestine perform to help the body maintain homeostasis?

Select all that apply

aiding in food absorption

aiding in food digestion

controlling peristalsis

protecting against harmful bacteria

Answer 1

- aiding in food digestion
- protecting against harmful bacteria

Explanation: Gut bacteria produce enzymes and metabolites that help break down food and outcompete pathogens. Absorption is carried out mainly by intestinal epithelial cells (though bacteria can make nutrients more available), and peristalsis is controlled by the enteric nervous system and smooth muscle, not directly by bacteria.