How does fall and rise in blood calcium stimulate secretion of parathyroid?

How does fall and rise in blood calcium stimulate secretion of parathyoids?

How does the bollworm die?

How does stampede happen?

How does an aeroplane take off ?

How does a radio telescope work?

How does nuclear fission take place?

Tobacco consumption is known to stimulate secretion of adrenaline and nor-adrenaline. The component causing this could be

How does sea level get changed?

How does Raoult's law behave in ideal solution?

How does the doctor's syringe work ?