Digestive enzymes and their action
The small intestine is where most chemical digestion takes place. Most of the digestive enzymes that act in the small intestine are secreted by the pancreas and enter the small intestine via the pancreatic dust.
Digestive enzymes and their action
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Name of gland
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Enzyme
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Acting on
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Product
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Salivary glands
(Mouth)
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Salivary amylase
(Ptyalin)
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Cooked starch
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Maltose
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Gastric glands
(stomach )
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Pepsin
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Proteins
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Peptides
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Rennin
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Milk casein
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Curd
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Pancreas
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Trypsin *
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Proteins, peptides
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Amino acids
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Chymotrypsin *
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Proteins, peptides
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Amino acids
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Carboxy peptidase *
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Peptides
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Amino acids
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Pancreatic amylase
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Starches
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Maltose
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Lipase
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Lipids
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Fatty acids & Glycerol
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Ribo nuclease
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RNA
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Ribonucleotides
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Deoxy ribonuclease
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DNA
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Deoxy Ribonucleotides
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Peptidases
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Peptides
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Aminoacids
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Sucrase
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Sucrose
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Fructose, Glucose
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Maltase
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Maltose
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Glucose
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Lactase
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Lactose
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Glucose, Galactose
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*Together called proteases
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Minerals required through diet
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Elements
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Functions
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Micronutrients:
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Chromium
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Involved in glucose metabolism
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Cobalt
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In vitamin B12, formation of Erythrocytes
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Copper
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Production of Hemoglobin, Bone formation
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Fluorine
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Resistance to tooth decay
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Iodine
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In Thyroid hormone
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Manganese
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Activates many enzymes
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Molybdenum
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Required by some enzymes
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Selenium
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Involved in the metabolism of fat
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Zinc
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Involved in the physiology of insulin
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Macronutrients
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Calcium
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In bones and teeth, in blood clotting
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Chlorine
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In digesting as hydrochloric acid
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Iron
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In Hemoglobin, Myoglobin
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Magnesium
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Found in bones and teeth, in many enzymes
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Phosphorous
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In nucleic acids, phospholipids and ATP
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Potassium
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Principal positive iron in cells, Nerve action
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Sodium
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Principal positive iron in cells, Nerve action
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Sulphur
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In proteins. Detoxification of toxins
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