Asked by Amber Pristas on Jun 10, 2024
Verified
Parathyroid hormone functions to increase calcium ion levels in blood. If its secretion is regulated through negative feedback, under which conditions would this hormone normally be released?
A) Parathyroid hormone secretion occurs when blood calcium levels are too low.
B) Parathyroid hormone secretion occurs when blood calcium levels are too high.
C) Parathyroid secretion is constant to maintain blood calcium levels.
D) Parathyroid hormone secretion increases in the morning and decreases in the afternoon.
Parathyroid Hormone
A hormone produced by the parathyroid glands that helps regulate calcium levels in the bloodstream and bone metabolism.
Negative Feedback
A regulatory mechanism in which a stimulus causes an opposing output in order to maintain an ideal level of whatever is being regulated.
Calcium Ion
A vital mineral in the body, serving important roles in cellular signalling, muscle function, and bone health.
- Acquire knowledge about the hormonal regulation of essential ions and nutrients in the body.
Verified Answer
SO
Sandra Odoms-MarkhamJun 10, 2024
Final Answer :
A
Explanation :
Parathyroid hormone (PTH) is released when blood calcium levels are low to increase calcium ion levels in the blood, acting through a negative feedback mechanism to maintain calcium homeostasis.
Learning Objectives
- Acquire knowledge about the hormonal regulation of essential ions and nutrients in the body.