Question

question 2. after consumption of food the macromolecules are broken down in the digestive tract. in the small intestine, the monomers that are left are then absorbed into the blood - stream. at first, the concentration of monomers is low inside of the small intestine compared to the blood - stream. over time, the concentration of monomers is high inside of the small intestine relative compared to the blood - stream. which processes allow for the transport of these large molecules at the beginning and end of the small intestine? (sc 012 - 14.21) a diffusion and then facilitated diffusion b facilitated diffusion and then active transport c osmosis and then diffusion d active transport and then diffusion

Explanation:

At the beginning, the concentration of monomers in the small intestine is low compared to the bloodstream, so facilitated diffusion (which uses transport proteins and moves substances down their concentration gradient) is likely. Later, when the concentration of monomers is high in the small intestine relative to the bloodstream, active transport (which requires energy and moves substances against their concentration gradient) is needed to transport the monomers into the bloodstream.

Answer:

B. Facilitated diffusion and then active transport