Podcast
Questions and Answers
What is the primary effect of the absence of PTH on calcium levels in the serum?
What is the primary effect of the absence of PTH on calcium levels in the serum?
- Increased absorption of calcium from the gastrointestinal tract
- Enhancement of bone calcium release into the bloodstream
- Improper regulation, leading to lower serum Ca2+ levels (correct)
- Reduced excretion of calcium by the kidneys
Which of the following conditions is NOT related to primary hypoparathyroidism?
Which of the following conditions is NOT related to primary hypoparathyroidism?
- Destruction of the parathyroid gland
- Chronic kidney disease (correct)
- Parathyroid gland aplasia
- Removal of the parathyroid gland
How does hypomagnesemia contribute to hypocalcemia?
How does hypomagnesemia contribute to hypocalcemia?
- It suppresses PTH secretion, causing lower calcium levels (correct)
- It enhances the reabsorption of calcium in the kidneys
- It increases intestinal calcium absorption
- It directly increases calcium release from bones
What is a significant consequence of impaired vitamin D metabolism in the absence of PTH?
What is a significant consequence of impaired vitamin D metabolism in the absence of PTH?
In primary hypoparathyroidism, why does bone tend to retain its calcium storage?
In primary hypoparathyroidism, why does bone tend to retain its calcium storage?
Flashcards
Hypocalcemia
Hypocalcemia
A condition where the blood calcium levels are abnormally low.
Primary Hypoparathyroidism
Primary Hypoparathyroidism
A condition where the parathyroid gland is not functioning properly, leading to low levels of parathyroid hormone (PTH).
Impact of Hypoparathyroidism on Calcium Regulation
Impact of Hypoparathyroidism on Calcium Regulation
When PTH is absent, the body holds onto calcium in the bones and increases its excretion in urine.
Role of PTH in Vitamin D Metabolism
Role of PTH in Vitamin D Metabolism
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Hypomagnesemia and Hypocalcemia
Hypomagnesemia and Hypocalcemia
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Study Notes
Hypocalcemia Causes
- Insufficient parathyroid hormone (PTH) impairs calcium regulation.
- This leads to increased calcium storage in bone and higher calcium excretion by the kidneys.
- Reduced vitamin D levels result from the lack of PTH's role in vitamin D metabolism.
- This further decreases calcium levels.
- Primary hypoparathyroidism arises from gland aplasia, destruction, or removal.
- Chronic hypomagnesemia, a growing issue in hospitalized patients, is a frequent cause.
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