Biology Questions and Answers
Vitamin C and the vitamins of the B
complex arvitamins. Vitaminse examples of water-sol A, D, E and K areuble
examples of fat-soluble vitamins.
Fat-solublsoluble in water, e vitamins,cannot e since thasily beey are not
excreted by the body. So taccumulate in tissues with toxichey tend to effect (^)
when they are ingested in amounts over
what is necessary.
- What are the main harms
caused by vitamin A
deficiency? How does this
vitamin act in the physiology
of vision?
Deficiency of vitamin A (retinol) may
cause night blindness, corneal (xerophthalmia) and predisposition todryness
skin injuries.
In the physioloparticipates in the formatiogy of vision, vitamin An of
rhodopsin, a visual perception in less illuminatepigment responsible for thed
places.
Nutrition Vitamins - Ivitamin A deficiency mage Diversity:
- What is folic acid? Why is
the anemia caused by
deficiency of folic acid known
as megaloblastic anemia?
The folic acid (wfolate) is a coenzymhen ionize that participatesed it is called (^)
in the synthesisand for this reason it is f and duplication oundamental forf DNA (^)
cell division. If there are not enough
folic acid in cells with glike red blood cells, they have theirreat turnover,
production reduced.
In folic acid d(reticulocytes)eficiency precursor cells that would originate
erythrocytes (rdivision but the process is very slowed blood cells) begin cell
while the cytoplasm growth is normal.
So the cells became typical feature of this kind of anemiaabnormally large, a
called megaloblastic anemia.
Megaloblastic anemia can be caused
also by vitamin B12 (cyanocodeficiency since this vitamin isbalamin)
important for cell division too. Both
types of anemia are nutrient deficiencyanemias.
Nutrition Vitamins - Imegaloblastic red blood cellmage Diversity:
- What are the vitamins
which make up the B
complex? Which problems
does the lack of these
vitamins cause?
Vitamins of the B complex are: thiamin,
or vitaminand niacin (B3), esse B1; riboflavin, or ntial for thevitamin B2,
constitution of the hydrogen acceptors
FAD, NAD metabolism;and NADP of the energetic pyridoxine, or B6; and
cyanocobalamin, or vitamin B12.
Deficiency of vitamin B1 causes beriberi,
loss of appetite avitamin B2 causes mnd fatigue. The lack oucosal injuries in f
the mouth, tongue and lips. Deficiency
of niacin disturbances, loss ocauses nervousnf energy andess, digestive
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