As part of the hormonal control of bone remodelling, low blood calcium levels result in a) Calcitonin release which stim

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As part of the hormonal control of bone remodelling, low blood
calcium levels result in
a) Calcitonin release which stimulates increased
calcification
b) Parathyroid hormone release which stimulates osteoclasts to
resorb bone
c) Increased osteoblast activity so more bone matrix is laid
down
d) None of the above, bone is only remodelled in response to
mechanical stress or injury