-- Dietary Fibre is the polysaccharide fraction of plant cell wall. -- It is a form of starch that is resistant to hydrolysis --Dietary fibre is important in animals for maintaining normal healthy intestinal tissues. -- In humans it is not digested due to the absence of the enzyme cellobiase. --Cellobiase is an enzyme that can split cellulose at beta 1-4 glycosidic linkage --Dietary Fibre as such does not have any nutritional value but it promotes peristalsis in intestines and prevents constipation. TYPES OF DIETARY FIBRE Advantages: --hypolipidemic effect --hypoglycemic effect' --keeps intestinal tract healthy --prevents constipation Disadvantages - -Excessive Fibre may cause irritation to intestinal mucosa causing diarrhoea,abdominal discomfort,bloating & constipation. --Excessive Fibre binds to zinc,calcium,magnesium and decreases their absorption.
Vitamin D is a fat soluble vitamin Vitamin D is also known as Cholecalciferol & anti- rachitic factor. STURCTURE OF VITAMIN D there are two forms of vitamin D Cholecalciferol - also called as Vitamin D2 naturally occurring obtained from animal sources by the action of UV rays of sunlight on 7 dehydrocholesterol Ergocalciferol - also called as Vitamin D3 artificially occurring obtained from plant sources by the action of UV rays on ergosterol
STEP-1 STEP-2 STEP - 3 STEP - 4 STEP - 5 STEP - 6 Mnemonic to remember the pathway with the help of products - Delta PHUC Pro Delta - Delta aminolevulinic acid P - Porphobilinogen H - Hydroxymethylbilane U - Uroporphyrinogen - III C - Coproporphyrinogen - III Pro - Protoporphyrinogen - III & Protoporphyrin - III
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