WHAT IS VITAMIN A

-

WHAT IS VITAMIN A

       Vitamin A is a fat soluble which plays a important role in the body. It is present in the food and it can also be taken in the form of supplements.

     In food two type of vitamin A found which are as follows
1. Preformed vitamin
2. Provitamin A

Preformed vitamin A are retinol and  retinyl ester which are found in the liver,fish and the dairy product where as provitamin A carotenoids are abundents in plant food like fruits,vegetables and oils.

  After the intake of two form of vitamin a our body convert it in retinal and retonic acid which are the active form of the vitamin. Since vitamin A is the fat soluble vitamin hence it is stored in the body tissue. It is also stored in the liver in the form of retinyl esters.

  FUNCTION OF VITAMIN A

     The main role of the vitamin A is the vision and eye health. Apart from it is also important in supporting cell growth,immune function,fetal development.

Retinal which is the active form of vitamin A is necessary for the colour vision and low light vision. It also protect and maintain the cornea and the conjunctiva. Apart from it vitamin A also helps in to maintain surface tissues such as skin,lungs,intestine,inner ear,bladder etc.

DEFICIENCY OF VITAMIN A

          Deficiency of vitamin A may lead to preventable blindness in the children. Apart from it deficiency of vitamin A raises the risk of anaemia and also affects the growth and development of the fetus. Lesser severe impact of vitamin A is the skin problem such as hyperkeratosis and acne.

FOOD SOURCE OF VITAMIN A

    The common foods which are rich in preformed vitamin A are

1. Egg yolk
2. Butter
3.Cod Liver oil
4. Liver
5. Salmon    
6.Trout

The common foods rich in provitamin A are

1. Sweet potatoes
2. Pumpkin
3. Carrots
4.Spinach
5.Cabbage
6.Parsely


  





Comments

Post a Comment

Popular posts from this blog

-
ENGLISH CLASS - 6  CHAPTER - 8 A GAME OF CH ANCE    WORKING WITH THE TEXT QUESTION A Complete the following sentences from memory choosing a phrase from those given in brackets. 1. --------------------------was held at the time of Eid festival.( A big show, A big fair, A big competition) 2. Tradesmen came to the village with all  kinds of goods ----------. (to display, to buy, to sell) 3. Uncle told me -------------- while  he was away.(not to buy anything, not to go anywhere, not to talk to anyone) 4. The owner of the Lucky Shop wanted everybody present ------------------------- .  (to play the game, to win a prize, to try their luck) 5. The first time I took a chance I got --------------.(a bottle of ink, two pencils, a trifle) 6. Uncle told me that the shopkeeper had made --------------.(a fool of me, a good profit, friends with many people) ANSWER 1. A big fair 2. to sell 3. not to buy anything 4. to try their luck 5. two...
Read more
-
SCIENCE CLASS 10 CHAPTER -1 CHEMICAL REACTION AND EQUATIONS QUESTION 1.     Which of the statements about the reaction below are incorrect?           2PbO(s) + C(s) → 2Pb(s) + CO2 2 (g) (a)Lead is getting reduced. (b)Carbon dioxide is getting oxidised. (c)Carbon is getting oxidised. (d)Lead oxide is getting reduced. (i)(a) and (b)                             (ii)(a) and (c) (iii)(a), (b) and (c)                    (iv)all ANSWER (i)(a) and (b) QUESTION 2. Fe 2 O 3 + 2Al → Al 2 O 3 + 2Fe The above reaction is an example of a (a)combination reaction. (b)double displacement reaction. (c)decomposition reaction. (d)displacement reaction. ANSWER (d)displacement reaction. QUESTION 3. What happens when dilute hydrochloric acid is added to iron fillings? Tick the correct answer. (a)Hydrogen gas and iron...
Read more

FULL FORM OF NSCCL

-
     NSCCL stand for National Securities Clearing Corporation of India Limited.Now it is known as NSE clearing limited. It is a wholly owned subsidiary of NSE which is responsible for clearing and settlement of all trades executed on NSE and deposit and collateral management and risk management function.It was the first clearing corporation to be established in India and introduced as settlement guarantee before it became a regulatory requirement. OBJECTIVE OF NSCCL There are some objectives of the NSCCL which are as follows- 1. To bring and sustain confidence in clearing and settlement of securities. 2. Promoting and maintaining short and consistent settlement cycles. 3. Provides counter party risk guarantee. 4. To operate a tight risk containment system.      As per CRISIL,the rating reflects NSCCL's status as Clearing Corporation for NSE. The rating also factors in NSCCL's rigorous risk management controls and adequate settlement guarant...
Read more