Parathormone is secreted during:

Deficiency of parathormone in humans leads to .....

What is the normal range of blood calcium levels in an adult human?

Exchange of calcium between bone and extracellular fluid takes place under the influence of certain hormones.
$(a)$ What will happen if there is an excess of $Ca^{++}$ in the extracellular fluid?
$(b)$ What will happen if there is a very low amount of $Ca^{++}$ in the extracellular fluid?

Which of the following hormones was discovered by James Bertram Collip?

Which of the following given organs are influenced by the activity of $PTH$?
The option containing all correct answers is
$I$. Kidney $II$. Bone $III$. Muscle $IV$. Intestine $V$. Brain