Question

one main role of the stomach is to chemically digest ____.
a complex carbohydrates
b phospholipids
c simple carbohydrates
d water
e proteins

question 32
in the small intestine, digested nutrients are ____.
a absorbed directly into blood vessels for transport to the rest of the body
b absorbed by epithelial cells, then pass into blood vessels for transport to the rest of the body
c absorbed by epithelial cells and passes between the cells, and then into the blood vessels for transport to the body

Explanation:

For the first question: The stomach secretes pepsin, an enzyme that initiates protein digestion. Complex/simple carbohydrates are digested in the mouth/small intestine; phospholipids in the small intestine; water is absorbed, not digested.
For the second question: Digested nutrients in the small intestine first cross the epithelial cells lining the intestinal wall, then enter blood vessels (capillaries or lacteals) for transport. They do not directly enter blood vessels or pass between cells.

Answer:

E. proteins
B. absorbed by epithelial cells, then pass into blood vessels for transport to the rest of the body