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Questions and Answers
Calcitonin is produced in which cells of the thyroid?
What is the function of calcitonin?
How does calcitonin work in relation to parathyroid hormone?
What is the function of parathyroid hormone?
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Where is parathyroid hormone secreted from?
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What is the target tissue of calcitonin?
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How does parathyroid hormone affect calcium absorption from food?
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What is the effect of parathyroid hormone on calcium in the bone?
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Study Notes
Thyroid Hormones
- Calcitonin is produced in the parafollicular cells (C-cells) of the thyroid gland.
Functions of Calcitonin and Parathyroid Hormone
- Calcitonin's primary function is to lower blood calcium levels by inhibiting bone resorption and promoting calcium excretion in the kidneys.
- Parathyroid hormone's primary function is to increase blood calcium levels by stimulating bone resorption and enhancing calcium absorption in the intestines.
Interplay between Calcitonin and Parathyroid Hormone
- Calcitonin and parathyroid hormone work in opposition to each other to maintain calcium homeostasis in the body.
Parathyroid Hormone
- Parathyroid hormone is secreted from the parathyroid glands, which are four small glands located behind the thyroid gland.
- The target tissue of parathyroid hormone is bone, where it stimulates the release of calcium into the bloodstream.
Calcium Regulation
- Parathyroid hormone increases calcium absorption from food by stimulating the activation of vitamin D in the kidneys.
- Parathyroid hormone also stimulates the release of calcium from bone into the bloodstream, leading to an increase in blood calcium levels.
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Description
Test your knowledge on calcitonin, a hormone secreted by the thyroid gland that regulates blood calcium levels by promoting bone formation and inhibiting bone breakdown. Learn about its functions and how it differs from parathyroid hormone in this quiz.
