_SIZ_homeostasis-calcium.html	homeostasis-calcium
Hi calcium: calcitonin from thyroid -> deposit in bone; low: muscle cramps (K, Na).<BR>
Inactive Vitamin D synthesized from cholesterol by sunlight.<BR>
Ca<sup>2+</sup></span> reabsorption not discussed in _FIG_../ch44/nephron_urine.html	kidney.