Melatonin is secreted from which cells of pineal gland
Correct Answer: Pinealocytes
Description: The pineal gland is a Neuroendocrine Transducer as it forms and secretes a hormone called Melatonin in response to sympathetic nerve activity. It consists of parenchymal cells (Pinealocytes), glial cells (neuroglia), secretory cells and numerous post-ganglionic sympathetic nerve fibres from cells in the superior cervical ganglion. It contains high amounts of 5 HT (serotonin), Nor-epinephrine and melatonin. Melatonin is synthesized from 5 HT and norepinephrine by the parenchymal cells (pinealocytes).Ref: Textbook of physiology, Dir. Prof. AK Jain, 5th edition.
Category:
Physiology
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now