Vitamin A Flashcards
What are the sources of vitamin A?
The net vitamin A has only an animal source
Liver eggs milk diary products
But there is provitamin A which are exist in the plants
Carrot and leafy plants
What is the name of the enzyme that convert carotenoid to vitamin A
Carotenease
Where is the carotenase exsit
Liver and intestinal cells
What are the substance the determine the normal skin tone
1- melanin
2-beta-caroten
3- hemiglobin
What is the color of the blood in a methemoglobin case
Like chocolate
What are the possible causes of the secondary vitamin A deficiency
1- liver disorder
2- pancreas disorder
3- intestine disease
What is the difference between methanol and ethanol toxicity also they are both alcohol
Methanol will turn into formic acid that damage the eyes
Ethanol will turn into acetic acid that damage the kidney
What is the drug(antidote) that we use to methanol toxicity
Fomepizol
What is the mineral that if we had a deficiency in it will lead to vitamin A deficiency
Zinc
What is the name of the enzyme that the bit A effect
Zinc finger
What is the element that response the zinc finger receptors
It is RXRE
Retinodes X DNA response element
What is the genatic disorder that cause tunnel vision experience to the patient and how we treat it
It is retinitis pigmentosa
And we treat with vit A
What vitamin is good in treating measles
Vit A
What is the disorder that happens in the vitamin A deficiency due to lose the ability to form rhodopisn
It is night blindness nyctalopia
What is the problems that happens in the vitamin A deficiency due to the keratization of tissues
1-keratomalacia
2- scaly skin
3- increase infection due to keratization of respiratory tracts villi
4- same with urinary tract
5- seminiferous rubules male sterility
6- weak bons and deley eruption of teeth
7- bilot spots on the conjuctiva
