Water, minerals and trace elements - Calcium - Function of calcium in the body
12 important questions on Water, minerals and trace elements - Calcium - Function of calcium in the body
What percentage of the calcium in our bodies is present in the bones/our skeleton?
In what form (with another molecule) is calcium present in bone?
What cell type produces bone tissue?
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What happens to the bone when osteoclasts basically eat away during the breakdown of bone?
Next to its role in the skeleton, what other role does calcium play in the body?
How can calcium trigger cells to perform certain functions, for example: how does calcium trigger movement of cells?
Because of the variety of cell types that calcium plays an important role for, a stable calcium concentration in the bodily fluids is essential. What two opposing hormones are responsible for keeping the blood calcium concentration at a constant value?
Calcitonin
At what value of blood calcium level are the parathyroid hormones and calcitonins supposed to keep the blood calcium level at?
How does the release of parathyroid hormones cause the blood calcium concentration to get higher when it's low?
Next to rigidity of bones, what other purpose does the calcium *in* bones serve?
Through what 2 processes is the activation of vitamin D beneficial to the process in which blood calcium levels are raised?
- Activated vitamin D stimulates the absorption of calcium in the small intestine --> more calcium gets into the blood
- Activated vitamin D stimulates the retention of calcium in the kidney --> more calcium is kept in the blood
Next to stimulating the uptake of calcium from the blood, does parathyroid hormone activate or inactivate vitamin D?
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