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Define the Functions of Vitamin A?
Vitamin A (retinol) is an essential nutrient needed in small amounts by humans for the normal functioning of the visual system, growth and development, and maintenance of epithelial cellular integrity, immune function, and reproduction. While we discuss the major functions of vitamin A, it is important to note &at primary vitamin A deficiency (VAD) may give rise to more than one secondary effects which can of tell be recognized in the form of clinical signs and symptoms most important being ocular manifestations grouped under 'xerophthamia. In addition to the specific signs and symptoms of xerophthamia and the risk of irreversible blindness, nonspecific symptoms include increased morbidity and mortality, poor reproductive health, increased risk of anaemia, and contributions o depressed growth and development.
How are gases exchanged in sponges? The gas exchange in sponges occurs by diffusion from the external to the cells that absorb molecular oxygen and release carbon dioxide.
Pollinia and Massulae In most cases the pollen grains of each tetrad become separated from one another and they lie freely in the pollen sac. In some plants, mostly members of
Define Fat requirements in human body? There is no change in fat digestibility at altitude of
Q. What do you mean by Ventricular Arrhythmias? Considerable disagreement exists regarding the significance of resting ventricular ectopic beats. In study comparing the coronar
What are the main manifestations of leishmaniasis? There are two major forms of leishmaniasis: cutaneous leishmaniasis and visceral leishmaniasis (also called as kala-azar). Th
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LOCOMOTIO N IN OCTOPUS - From the ends of arms or ex-current siphon water is throughn with speed, opposite to it animal moves.
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What is a food chain? The food chain is not branched it is linear sequence in which a living being serves as food for another, starting with the producers and going up to the d
Explain in detail about the optic nerve The optic nerve contains more than one million axons that initiate in the ganglion cell layer of the retina. This structure originatcs a
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