|
Which hormone /gland acts in biological clocks? |
|||||||
|
a) |
Thyroid |
b) |
Thymus |
c) |
Adrenal |
d) |
Pineal |
|
Which hormone /gland acts in biological clocks? |
|||||||
|
a) |
Thyroid |
b) |
Thymus |
c) |
Adrenal |
d) |
Pineal |
(d)
Pineal gland secretes melatonin hormone. The concentration of this hormone in blood appears to flow a diurnal (day-night) cycle as it arises in the evening and through the night, it regulates working of gonads (testes and ovaries).