Asked by Michelle Stobaugh on May 21, 2024
Verified
Which statement is correct about PTH?
A) When calcium level rises, PTH secretion is activated.
B) When calcium level lowers, PTH secretion is stimulated.
C) PTH has the same effect as calcitonin.
D) PTH inhibits calcium absorption from the gut.
E) PTH decreases the activity of osteoclasts.
PTH
Parathyroid hormone, a regulator of calcium and phosphorus metabolism in the body.
Calcitonin
A hormone produced by the thyroid gland that helps regulate calcium levels in the blood.
Osteoclasts
A type of bone cell that breaks down bone tissue, a process important for bone maintenance, repair, and remodelling.
- Acquire knowledge about the contribution of hormones to the maintenance of homeostasis.
Verified Answer
AL
Aylin LopezMay 25, 2024
Final Answer :
B
Explanation :
PTH secretion is stimulated when calcium levels in the blood decrease. This causes PTH to promote the release of calcium from bones and increase calcium absorption from the gut and kidneys. PTH has the opposite effect of calcitonin, which promotes calcium deposition in bones and decreases calcium absorption. It also stimulates the activity of osteoclasts, which are cells that break down bone tissue to release calcium.
Learning Objectives
- Acquire knowledge about the contribution of hormones to the maintenance of homeostasis.