The blood calcium level is lowered by the deficiency of:
Correct answer: C. Parathormone
- A. Both calcitonin and parathormone
- B. Calcitonin
- C. Parathormone
- D. Thyroxine
Explanation
Parathormone is secreted by chief cells of the parathyroid that regulate the metabolism of calcium and phosphate. It increases calcium absorption from the intestine and also increases calcium resorption from the nephrons of the kidneys. So its deficiency leads to low blood calcium level.
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Coordination depends on receptors, neurons, synapses and nerve impulses, with reflex actions traced through the reflex arc and the roles of major brain regions. Chemical coordination covers endocrine glands and hormones, including how hormones regulate growth, metabolism, reproduction and internal balance, unlike rapid nervous control.
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