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Questions and Answers
Which hormone is produced in the parafollicular cells of the thyroid?
Which hormone is produced in the parafollicular cells of the thyroid?
- Parathyroid hormone
- Calcitonin (correct)
- Insulin
- Thyroxine
What is the function of calcitonin?
What is the function of calcitonin?
- Decreases blood calcium levels (correct)
- Increases bone breakdown
- Increases blood calcium levels
- Increases bone formation
How does calcitonin affect bone reabsorption?
How does calcitonin affect bone reabsorption?
- It promotes osteoblast activity
- It inhibits osteoclasts (correct)
- It promotes osteoclast activity
- It inhibits osteoblasts
What is the target tissue of calcitonin?
What is the target tissue of calcitonin?
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Which hormone is secreted from the parathyroid gland?
Which hormone is secreted from the parathyroid gland?
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What is the function of parathyroid hormone?
What is the function of parathyroid hormone?
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How does parathyroid hormone affect calcium within the bone?
How does parathyroid hormone affect calcium within the bone?
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What does parathyroid hormone increase the absorption of?
What does parathyroid hormone increase the absorption of?
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Study Notes
Thyroid Hormones
- Calcitonin is produced in the parafollicular cells of the thyroid gland.
- The primary function of calcitonin is to decrease blood calcium levels.
Calcitonin's Effects
- Calcitonin inhibits bone reabsorption, reducing the breakdown of bone tissue.
- Calcitonin targets bone tissue, specifically osteoclasts, to reduce their activity.
Parathyroid Hormone
- Parathyroid hormone is secreted from the parathyroid gland.
- The primary function of parathyroid hormone is to increase blood calcium levels.
Parathyroid Hormone's Effects
- Parathyroid hormone stimulates bone reabsorption, increasing the breakdown of bone tissue and releasing calcium into the bloodstream.
- Parathyroid hormone increases the absorption of calcium from food in the intestines.
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