41.3 absorption in small intestine

Question 1

absorption

Answer 1

from lumen-> lining of alimentary canal-> body tissues -passive or active transport

Question 2

villi

Answer 2

fingerlike projections on large folds in the small intestine

Question 3

microvilli

Answer 3

microscopic appendages on villi

Question 4

fat digestion

Answer 4

1) fats digested earlier are absorbed into epithelial cells 2) fatty acids and monoglycerides join to single fatty acid (in the epithelial cell) 3) then they are coated with phospholipids, cholesterol, and proteins to make chylomicrons (water soluble) 4) then they are transported into lacteal (not the capillaries b/c they are too big) 5) lacteal takes them to lymphatic system -> the heart

Question 5

chylomicrons

Answer 5

water soluble triglycerides coated with phospholipids, cholesterol and proteins in the epithelial cells

Question 6

what happens to the capillaries and veins that take the blood from the villi

Answer 6

-converge into the hepatic portal vein that goes to the liver -the liver 1) regulates distribution of nutrients to other tissues and organs 2) liver removes toxic stuff then blood goes to -> heart and other tissues and organs

Question 7

fat digestion

Answer 7

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