Question

match the words in the left - column to the appropriate blanks in the sentences on the right. view available hint(s) peristalsis carrier protein lymphatic system active transport endocytosis hepatic portal vein facilitated diffusion passive diffusion large intestine 1. a process called helps to propel first the bolus and then chyme forward through the esophagus, stomach, 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, which requires both a carrier protein and energy in the form of atp. 5. a fourth method is called, 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. 7. fat - soluble nutrients initially travel via the before entering the bloodstream. 8. most water is absorbed in the, and solid waste is then eliminated. reset help submit

Explanation:

1. Peristalsis is the wave - like muscle contractions that move food through the digestive tract.
2. Facilitated diffusion uses carrier proteins but no energy for nutrient absorption.
3. Passive diffusion allows small molecules to cross membranes without energy or carrier proteins when there is a concentration gradient.
4. Active transport of nutrients like glucose and amino acids requires both a carrier protein and ATP.
5. Endocytosis is the process where a cell membrane forms a vesicle to engulf and take in nutrients.
6. Water - soluble nutrients travel to the liver via the hepatic portal vein.
7. Fat - soluble nutrients first travel via the lymphatic system before entering the bloodstream.
8. Most water is absorbed in the large intestine and then solid waste is eliminated.

Answer:

1. peristalsis
2. facilitated diffusion
3. passive diffusion; carrier protein
4. active transport
5. endocytosis
6. hepatic portal vein
7. lymphatic system
8. large intestine