calcitonin is the agonist to pth

agonist anatomical anatomy blood body bone ca2 calcitonin calcium channel diagram disease endocrine gland health healthy homeostasis hormone human hypothyroidism illustration intestine kidney kidneys labels medical medicine osteoclast osteocyte osteon osteoporosis parafollicular parathormone parathyrin parathyroid pth regulation schematic science section structure the thyroid trh vector