Understanding Osteoclastogenesis Regulation

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What response is triggered when blood calcium ion level decreases below 8.5 mg/dL?

Osteoclasts release stored calcium ions from bone

In response to low blood calcium levels, what hormone do the parathyroid glands secrete?

Parathyroid hormone (PTH)

What is the effect of high calcium ion levels in the blood?

Thyroid gland secretes calcitonin

In cases of high blood calcium levels, what is the effect on kidney function?

<p>Calcium is reabsorbed</p> Signup and view all the answers

Which hormone is secreted by the thyroid gland in response to high blood calcium levels?

<p>Calcitonin</p> Signup and view all the answers

What triggers osteoclasts to release stored calcium ions from bone?

<p>Low blood calcium levels</p> Signup and view all the answers

What happens to osteoclast activity in response to Calcitonin?

<p>Decreases</p> Signup and view all the answers

Which organ decreases the absorption of calcium in response to Calcitonin?

<p>Intestine</p> Signup and view all the answers

What effect does Calcitonin have on the excretion of calcium ions by the kidneys?

<p>Less excretion</p> Signup and view all the answers

What is the major type of fracture characterized by cracks or breaks due to physical stress?

<p>Transverse fracture</p> Signup and view all the answers

During fracture repair, which step involves the production of a large blood clot and establishes a fibrous network?

<p>Fracture hematoma formation</p> Signup and view all the answers

What happens to calcium excretion by the kidneys when calcium levels in the blood decrease?

<p>Increased calcium excretion</p> Signup and view all the answers

Which hormone is responsible for increasing blood calcium ion levels by stimulating osteoclast activity, enhancing calcitriol secretion, and decreasing calcium excretion by kidneys?

<p>Parathyroid hormone (PTH)</p> Signup and view all the answers

What condition is characterized by abnormal bone development and is caused by insufficient growth hormone secretion?

<p>Pituitary dwarfism</p> Signup and view all the answers

Which hormone decreases blood calcium ion levels by inhibiting osteoclast activity, increasing calcium excretion, and reducing calcitriol secretion by kidneys?

<p>Calcitonin</p> Signup and view all the answers

What is the most abundant mineral stored in bones?

<p>Calcium</p> Signup and view all the answers

Which of the following cells secrete calcitonin to help regulate blood calcium ion levels?

<p>C cells</p> Signup and view all the answers

In abnormal bone development, which condition is characterized by excessive growth due to an excess of growth hormone?

<p>Gigantism</p> Signup and view all the answers

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