In this video I have explained briefly about three types of adipose tissues: white adipose tissue, brown adipose tissue and biege adipose tissue. The brown adipose tissue is abundantly seen in neonates and the quantity of it decreases as neonate develops into infant, child, adolescent and adult.
Brown adipose tissue has more mitochondria with high expression of an uncoupler protein called thermogenin. Thermogenin is also referred as uncouplin protein 1 (UCP1). Thermogenin acts as uncoupler of electron transport chain and uncouple oxidation from phosphorylation in electron transport chain. This way thermogenin in brown adipose tissue decreases the efficiency of electron transport chain thereby decreasing effective ATP generation from substrate oxidation.
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