Physiology Melatonin is secreted by parenchymal cells of pineal gland. Fever causes: A Thermoregulatory centre to shift to new level B Resetting of skin temperature C Both of the above D None of the above 💡 Explanation Melatonin is secreted by parenchymal cells of pineal gland. Fever causes: ✓ Correct Answer: A. Thermoregulatory centre to shift to new level