Gluconeogenesis is controlled by

There are many endocrine glands in the human body. Name the glands which are absent in males and the ones absent in females.

Give scientific reasons:
$(1)$ Hormones are regulatory chemicals.
$(2)$ Less secretion of thyroxine results in stunted growth of a person.
$(3)$ Deficiency of insulin results in diabetes mellitus.
$(4)$ Pancreas is an exocrine and endocrine gland.

Identify the endocrine glands $P, Q,$ and $R$ in the given figure.
$\quad\quad\quad P \quad\quad\quad Q\quad\quad\quad R$

Which of the following hormones regulate carbohydrate metabolism?

The integrated system of the body is .....