Mechanisms of Absorption (AQA A-Level Biology): Flashcards
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Part of small intestine specialized for absorption
Part of small intestine specialized for absorption
Ileum
Finger-like projections in intestinal wall
Finger-like projections in intestinal wall
Villi
Projections on epithelial cell surface
Projections on epithelial cell surface
Microvilli
By how much do villi & microvilli increase surface area?
By how much do villi & microvilli increase surface area?
Up to 600 times
Lymphatic capillary in villus centre
Lymphatic capillary in villus centre
Lacteal
Absorption method: amino acids & monosaccharides
Absorption method: amino acids & monosaccharides
Diffusion and co-transport
What forms from fatty acids, monoglycerides & bile salts?
What forms from fatty acids, monoglycerides & bile salts?
Micelles
Lipid transport particles in body fluids
Lipid transport particles in body fluids
Chylomicrons
Where do chylomicrons enter from epithelial cells?
Where do chylomicrons enter from epithelial cells?
Lacteals (lymphatic capillaries)
What dual property do bile salts have?
What dual property do bile salts have?
Lipophilic and hydrophilic ends