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Nuclear Retinoid Receptors. Deficiency of Vitamin A. Nyctalopia Decreased mucus production Leading to bacterial invasion in the eye Conjunctival xerosis Bitot’s spots Keratomatacia Xerophthalmia. Toxicity of Vitamin A. Vitamin D. Vitamin D Synthesis. Regulate blood calcium level .
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Deficiency of Vitamin A • Nyctalopia • Decreased mucus production • Leading to bacterial invasion in the eye • Conjunctival xerosis • Bitot’s spots • Keratomatacia • Xerophthalmia
Regulate blood calcium level Functions of Vitamin D
Deficiency • Osteomalacia • Rickets • Osteoporosis