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Question

Brown-adipose tissue in humans is restricted to

A
6th month of postnatal life
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B
3rd month of postnatal life
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C
1st month of postnatal life
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D
None of the above
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Solution

The correct option is B 3rd month of postnatal life
Brown adipose tissue is present in large amounts in the newborn, which helps offset the extensive heat loss, that results from the newborn's high surface-to-mass ratio and avoids lethal hypothermia. In newborns, brown adipose tissue makes up about 5% of the total body mass and is located on the back, along the upper half of the spine, and towards the shoulder. The amount gradually decreases as the body grows and is maximum at the 3rd month of the postnatal life. So, the correct answer is option B.

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