Asked by abongile nyathi on May 14, 2024
Verified
Which of the following is NOT a direct effect of parathyroid hormone (PTH) ?
A) Increased Ca2+ uptake by the small intestine
B) Increased vitamin D formation in the kidneys
C) Increased Ca2+ reabsorption by the kidneys
D) Decreased Ca2+ loss by the kidneys
E) All of the choices are direct effects of PTH.
Parathyroid Hormone (PTH)
Peptide hormone produced by the parathyroid gland; increases bone breakdown and blood calcium levels.
Vitamin D Formation
The synthesis of vitamin D in the skin under the influence of ultraviolet radiation from sunlight, important for calcium absorption and bone health.
- Familiarize yourself with the role of specific hormones in the maintenance of calcium levels and bone metabolic processes.
Verified Answer
MR
Marrisa RudderMay 14, 2024
Final Answer :
A
Explanation :
Increased calcium uptake by the small intestine is an indirect effect of PTH, mediated through its action on vitamin D activation in the kidneys, which then increases intestinal calcium absorption.
Learning Objectives
- Familiarize yourself with the role of specific hormones in the maintenance of calcium levels and bone metabolic processes.