Podcast
Questions and Answers
What is the primary effect of PTH on the kidneys?
What is the primary effect of PTH on the kidneys?
What triggers the secretion of PTH in the blood?
What triggers the secretion of PTH in the blood?
What process does PTH activate in the bone?
What process does PTH activate in the bone?
Which of the following hormones is NOT involved in regulating serum Ca2+ levels?
Which of the following hormones is NOT involved in regulating serum Ca2+ levels?
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What is one of the actions of PTH in relation to vitamin D?
What is one of the actions of PTH in relation to vitamin D?
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Study Notes
Calcium Regulation Hormones
- Three hormones regulate serum calcium (Ca2+): parathyroid hormone (PTH), vitamin D, and calcitonin.
- These hormones adjust secretion according to ionized Ca2+ levels.
- PTH release is triggered by low ionized Ca2+ and inhibited by high levels.
PTH Effects
- PTH significantly influences bone and kidneys.
- In bone, PTH activates osteoclasts, leading to bone resorption and Ca2+ release into the extracellular fluid (ECF).
- In kidneys, PTH promotes Ca2+ reabsorption in the tubules.
- PTH also stimulates the kidneys to produce active vitamin D.
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Description
Test your knowledge on the hormones that regulate serum calcium, including parathyroid hormone, vitamin D, and calcitonin. Explore their effects on bones and kidneys, and understand how they respond to ionized calcium levels. This quiz will challenge your understanding of calcium homeostasis.
