Which hormone is a very effective antioxidant,one that may protect CNS neurons from free radicals such as nitric oxide (NO)or hydrogen peroxide (H₂O₂)?
A) insulin
B) melanin
C) calcitonin
D) glucagon
E) melatonin

Question

Quizplus · Accepted Answer

Melatonin is a hormone that is a very effective antioxidant, and has been shown to protect CNS neurons from free radicals such as nitric oxide (NO) or hydrogen peroxide (H₂O₂). Its antioxidant properties are due to its ability to readily donate electrons to free radicals, neutralizing their damaging effects. Melatonin is primarily synthesized and secreted by the pineal gland in response to darkness, and its production is regulated by the suprachiasmatic nucleus in the hypothalamus.

Which Hormone Is a Very Effective Antioxidant,one That May Protect