Question

se being transported from the lumen of the digestive tract, through ep and into the bloodstream is called ______________. excretion secretion digestion absorption

Explanation:

To solve this, we analyze each option:

• Excretion: Removal of waste, not nutrient uptake.
• Secretion: Release of substances (e.g., enzymes), not absorption.
• Digestion: Breakdown of food, not transport into blood.
• Absorption: Process of nutrients moving from digestive tract lumen, through epithelial cells, into bloodstream.

Answer:

D. absorption