9.3 ABSOPRTION

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DOMAIN EXPANSION: BRILLIANT KNOWLEDGES

Cards (17)

What is the predominant site of nutrient absorption in the human digestive system?
Ileum
What are the adaptive characteristics of the ileum for nutrient absorption? 
Highly folded intestinal lining
Presence of villi
Epithelial cells with microvilli
Villi are one-cell thick
Network of blood capillaries in villi
Presence of lacteals for fatty acids and glycerol absorption
How long is the small intestine? 
6 m
Why are villi important in the absorption process? 
They increase the surface area for absorption.
What is the thickness of the villi? 
Villi are one-cell thick.
What do lacteals absorb? 
Fatty acids and glycerol.
Where do the end products of digestion get absorbed? 
Into the bloodstream or lymphatic system.
What are the end products of digestion mentioned in the material? 
Glucose and galactose.
What are the methods of absorption for different nutrients?
Glucose, galactose: Active transport
Fructose: Facilitated diffusion
Amino acids: Active transport
Vitamins B and C: Absorbed with water
Water: Osmosis
Fatty acids, glycerol: Simple diffusion
Vitamins A, D, E, K: Simple diffusion
How are glucose and galactose absorbed? 
Through active transport into blood capillaries.
How is fructose absorbed? 
Through facilitated diffusion into blood capillaries.
How are amino acids absorbed? 
Through active transport into blood capillaries.
How are vitamins B and C absorbed? 
Together with water into blood capillaries.
How is water absorbed in the digestive system?
Through osmosis into blood capillaries.
How are fatty acids and glycerol absorbed? 
Through simple diffusion into lacteals.
How are vitamins A, D, E, and K absorbed? 
Through simple diffusion into lacteals.
What are the practice topics related to the digestive system mentioned in the material? 
Digestive System
Digestion
Absorption
Assimilation
Defaecation
Balanced Diet
Health Issues Related to the Digestive System and Eating Habits