Multiple Choice
In the context of calcium homeostasis, parathyroid hormone (PTH) is antagonistic to which hormone?
61
views
16. The Endocrine System
Introduction to the Endocrine System
Multiple Choice
Which tissue is a primary target of parathyroid hormone (PTH)?
A
Bone tissue (osteoblasts/osteoclast regulation)
B
Pancreatic beta cells
C
Thyroid follicular cells
D
Adipose tissue
Verified step by step guidance1
Understand the role of parathyroid hormone (PTH): PTH is a hormone secreted by the parathyroid glands that primarily regulates calcium levels in the blood.
Identify the main target tissues of PTH: PTH acts mainly on bone tissue, kidneys, and intestines to increase blood calcium levels.
Focus on bone tissue: In bone, PTH influences osteoblasts and osteoclasts. Osteoblasts are bone-forming cells, while osteoclasts are bone-resorbing cells.
Explain the mechanism in bone: PTH stimulates osteoblasts to release signals that activate osteoclasts, which then break down bone matrix, releasing calcium into the bloodstream.
Compare with other options: Pancreatic beta cells produce insulin, thyroid follicular cells produce thyroid hormones, and adipose tissue stores fat; none of these are primary targets of PTH.
Related Videos
Related Practice
