Vitamin - a, Biology

Assignment Help:

VITAMIN - A

  1. Discovered by Macollum.
  2. Also known as Retinol / Antixeropthalmic vitamin / Auxerophthol.
  3. It is vitamin for normal vision. It forms retinal pigments rhodopsin & iodopsin.
  4. It is anti-infective vitamin.
  5. It is stored in liver.
  6. Its deficiency cause toad skin (follicular hyperkeratosis).
  7. Its deficiency causes night blindness (Nyctolopia / Henerolopia).
  8. It's deficiency causes xeropthalmia, in which cornea becomes dry, keratinization of cornea start, tear formation absent & it may lead to total blindness.
  9. Keratomalesia is due to prolonged deficiency of vitamin A, in which keratinization & degeneration of cornea takes place.
  10. Vitamin A prevents keratin deposition in surface cells and glandular epithelium.
  11. Source of vitamin A - carrot, guava, papaya, mango, liver, egg, yolk & cod liver oil.

Related Discussions:- Vitamin - a

Explain the irradiation and its implication, Explain the Irradiation and it...

Explain the Irradiation and its Implication The issues are the decreased salivary flow, liability for infection because of the decreased blood supply and the possibility of ost

Expain kingdom fungi, Kingdom Fungi Fungi was earlier placed with the t...

Kingdom Fungi Fungi was earlier placed with the true plants and are still largely considered so in the domain of botanists yet they are quite different. They are multicellular

Haematology, differenciate between plasma and serum

differenciate between plasma and serum

Illustrate nernst equilibrium potential for potassium ions, Illustrate Nern...

Illustrate Nernst equilibrium potential for potassium ions A complete motor neuron is removed from a frog and placed in normal physiological saline at 1 AM.  The neuron is hea

Tasks of orientation phase - phases of nurse, Tasks of  Orientation Phase: ...

Tasks of  Orientation Phase: Establishing contact with the patient  Developing  the pactlcontract  Talking to the patient  Establishing Contact with the Patient

Symptoms of mitral regurgitation, Q. Symptoms of mitral regurgitation? ...

Q. Symptoms of mitral regurgitation? Symptoms depend upon underlying etiology of mitral regurgitation. Patients with mild mitral regurgitation and most of those with even sever

What body systems respond to resist the changes, Jennifer has the "stomach ...

Jennifer has the "stomach flu" that is going around campus and has been vomiting profusely for the past 24 hours. Not only has she been unable to keep down fluids or food but she h

DNA REPAIR, assignment for discussing DNA REPAIR

assignment for discussing DNA REPAIR

Define phospholipids, a) Lipoproteins are large molecular compounds that a...

a) Lipoproteins are large molecular compounds that are essential to the transport of cholesterol and triglycerides (TGs) within the blood. They contain a lipid core composed of TG

Chemical bond maintains the pairing of each chain, Which type of chemical b...

Which type of chemical bond maintains the pairing of each chain in the DNA molecule? Ans) To form the DNA molecule, purine bases bind to pyrimidine bases by intermolecular bonds

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd