Calcium homeostasis
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33 Terms
What is the most abundant mineral in the body?
Calcium
How much calcium is in the body of a young adult human?
1.1kg (27.5 mol)
How much calcium is present in the skeleton and blood/other tissues
99% and 1%
What is the total plasma calcium?
2.5mmol/L (range 2.2-2.6 mmol/L) - tightly controlled
What are the 3 different forms of calcium?
Which calcium is physiologically active?
Ionised calcium
What are the 6 functions of calcium?
The amount of calcium we get is the same amount which we?
Excrete
Why do pegnant/breast feeding women have problems with their bones?
As they need more calcium
What is the calcium homeostasis in the blood?
Low calcium increases the excitability of?
Neuronal and muscular plasma membrane
High calcium causes?
Cardiac arrhthmia
What 3 hormones regulate calcium?
Which one is the main hormone regulator?
Parthyroid hormone then calcitriol then calcitonin
Parathyroid Hormone (PTH)
Minute to minute regulation of PTH secretion
Long term regulation of PTH secretion
Actions of PTH
Vitamin D
Regulation of calcitriol production
Actions of calcitriol
Calcitonin
Actions of calcitonin
Physiological role of calcitonin
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