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Explain briefly about the selenium Toxicity?
There is a narrow margin between the beneficial and harmful intakes of selenium. The level at which selenosis occurs is not well-defined but threshold for toxicity appears to be 850-900 μg per day. Symptoms of chronic toxicity include brittle hair and nails, skin lesions with secondary infections and garlic odour in the breath. Chronic selenium poisoning in people is characterized primarily by loss of hair and changes in finger nail morphology. In some cases, skin lesions may occur.
Define the effect of niacin deficiency on Skin? Dermatitis is the characteristic feature of the' disease, It is symmetrical in distribution. In early stages, a bright red eryt
Why is the carbon dioxide concentration a limiting factor of the photosynthesis process? When the carbon dioxide concentration is increased indefinitely is photosynthesis also incr
Roots have no chlorophyll and grow in darkness. So how do roots obtain their food? Food made in the leaves is transported to the roots in the phloem of the vascular bundles.
Define the Quantitative Analysis in Nutritional Biochemistry? Quantitative analysis involves the measurement of the amount of a substance present. This measurement can be done
Valvular Heart Diseases Normal heart valves function to maintain a uni-directional flow of blood through cardiac chambers. Two basic problems that compromise the normal functi
What is the concept of minimum and maximum way of tolerance
LIPOIDA L MODELS According to Overton (1902) plasma membrane consists of single layer of lipid, because cell permeability is related to lipids. According to Gorter and
Despite the technologic advances of recent years, many patients with chronic heart failure are elderly and have multiple comorbidities. Many of them will not experience meaningful
Why can the consumption of molecular oxygen indicate the metabolic rate of aerobic organisms? Molecular oxygen (O2) consumption has direct relation to the cell metabolic rate i
What are the Biotolerant materials Biotolerant materials, are characterized by a thin fibrous tissue interface. The fibrous tissue layer develops as a result of the chemical pr
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