I) Absorption is the uptake of substances by the epithelial cells lining the digestive tract, followed by the transport of these substances throughout the body A) Substances absorbed include water, salts, simple sugars, small peptides, lipids, vitamins, minerals, ethanol, and drugs B) Absorption involves diffusion, facilitated diffusion, cotransport, and active transport mechanisms C) Absorption as a two-step process 1) substances are taken into cells across the apical membrane 2) substances leave cell across the basement membrane II) Absorbed substances are distributed throughout the body A) Water soluble substances leave epithelial cells and enter the hepatic portal circulation (to liver) B) Products of lipid digestion enter the lymphatic circulation (bypassing the liver) before entering the circulatory system and reaching adipocytes III) Where in the digestive tract does absorption occur?
(I) Absorption; is; the uptake of substances by the epithelial cells lining the digestive tract, followed by the transport of these substances throughout the body A) (A) Water soluble substances; enter; the hepatic portal circulation) (the epithelial cells; lining; the digestive tract) (A) Water soluble substances; leave; epithelial cells) Context(A ) Water soluble substances leave,List([597, 630))):(2) substances; leave; cell) (the uptake of substances by the epithelial cells; followed; ) (to liver; enter; the lymphatic circulation (bypassing the liver; T:before entering the circulatory system and reaching adipocytes III) (Absorbed substances; are distributed; L:throughout the body)
A ) Water soluble substances leave,List([597, 630))
I) Absorption A) Water soluble substances the epithelial cells A) Water soluble substances 2) substances the uptake of substances by the epithelial cells to liver Absorbed substances
is enter lining leave leave followed enter are distributed
the uptake of substances by the epithelial cells lining the digestive tract, followed by the transport of these substances throughout the body A
the hepatic portal circulation
the digestive tract
epithelial cells
cell
the lymphatic circulation (bypassing the liver T:before entering the circulatory system and reaching adipocytes III
L:throughout the body