endocytosis

Question

facilitated diffusion
lymphatic system
hepatic portal vein
large intestine
active transport
passive diffusion
peristalsis
carrier protein
. A process called and small intestine.
2. Nutrients are absorbed through the lining of the small intestine via a variety of mechanisms. Most nutrients require
where a specific carrier protein is utilized, but no energy is required.
3. Some smaller molecules can cross via
Like with facilitated diffusion, no energy is required because the
concentration of a nutrient is higher inside the Gi tract than in the enterocyte. Unlike with facilitated diffusion, however, no
is needed.
4. Nutrients like glucose and amino acids are absorbed through energy in the form of ATP.
, which requires both a carrier protein and
5. A fourth method is called
engulfing the nutrient and then drawing the nutrient into the cell.
which involves a vesicle that forms from the enterocyte's cell membrane,
6. Once absorbed, water-soluble nutrients like carbohydrates and amino acids enter capillaries and travel to the liver via the
7. Fat-soluble nutrients initially travel via the
before entering the bloodstream.

Answer 1

Here’s how to fill in the blanks from the provided statements:

1. A process called peristalsis moves food through the gastrointestinal (GI) tract and small intestine.
2. Nutrients are absorbed through the lining of the small intestine via a variety of mechanisms. Most nutrients require facilitated diffusion, where a specific carrier protein is utilized, but no energy is required.
3. Some smaller molecules can cross via passive diffusion. Like with facilitated diffusion, no energy is required because the concentration of a nutrient is higher inside the GI tract than in the enterocyte. Unlike with facilitated diffusion, however, no carrier protein is needed.
4. Nutrients like glucose and amino acids are absorbed through active transport, which requires both a carrier protein and energy in the form of ATP.
5. A fourth method is called endocytosis, which involves a vesicle that forms from the enterocyte's cell membrane, engulfing the nutrient and then drawing the nutrient into the cell.
6. Once absorbed, water-soluble nutrients like carbohydrates and amino acids enter capillaries and travel to the liver via the hepatic portal vein.
7. Fat-soluble nutrients initially travel via the lymphatic system before entering the bloodstream.

This clarified version provides a coherent overview of the absorption mechanisms of nutrients in the small intestine and their subsequent transport in the body.