Answer:
biology is the study of living things
The major hormones that are responsible for normal calcium homeostasis are parathyroid hormone and 1,25-dihydroxyvitamin D; these hormones control extracellular fluid calcium on a chronic basis.
Answer:
To make them interested in what u want to sell or work there for a person, meaning if what u r selling is very bad, how would u persuade someone that it is not bad and make them buy it.