NEET Biology Digestion and Absorption
Digestion and Absorption PDF Notes, Important Questions and Synopsis
SYNOPSIS
- Conversion of complex food substances to simple absorbable substances is called digestion.
- Human Digestive System
- Summary of Chemical Digestion
Part of the Alimentary Canal
Digestive Juices/Enzymes Source of Secretion
Food Digested End-product - Mouth
Saliva
Salivary amylase
Salivary glands
Polysaccharides (Starch)
Disaccharides (Maltose)
- Oesophagus
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-
-
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- Stomach
Gastric juice
HCl
Gastric glands
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Converts pepsinogen and prorennin to the corresponding active forms pepsin and rennin
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Provides an acidic environment
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Kills bacteria in food
Pepsin
Gastric glands
Proteins
Proteoses, peptones
Rennin (found in infants and young children)
Gastric glands Casein Proteoses, peptones Gastric lipase
Gastric glands
Fats (emulsification)
Fatty acids and glycerol
Small Intestine (Duodenum)Bile
Bile (bilirubin + biliverdin + cholesterol + phospholipids + bile salts)
No enzymes
Liver (stored in the gall bladder)
Fats
Emulsifies fats into micelles
Pancreatic juice
Trypsin, chymotrypsin, carboxypeptidase
Pancreas Proteins, peptones, proteoses Dipeptides Amylase
Pancreas Polysaccharides Disaccharides Lipase
Pancreas
Fats Diglycerides, monoglycerides Nucleases
Pancreas Nucleic acids Nucleotides Succus entericus
Disaccharidases
(Example: Maltase)
Intestinal glands
Disaccharides
(Example: Maltose)
Monosaccharides
(Example: Glucose)
Dipeptidases
Intestinal glands Dipeptides
Amino acids Lipases
Intestinal glands
Monoglycerides Fatty acids and glycerol Nucleases
Intestinal glands Nucleotides
Nucleosides Nucleases
Intestinal glands Nucleosides Sugars and nitrogenous bases
Videos
- does crypts of leiberkuhn produce succus entericus ?
- ingredients means what
- Digestive system
- ⭕ given answer is Option A, but digestion first starts from mouth where ptylin enzymes act on it which is basic.
Then how assertion is true ?
- ⭕Answer in detail....Thanks!
- ⭕ Explain in detail.... Thanks ☺️
- role of muscles in the stomach wall in digestiveprocess
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