Which are the common functions of the nervous and endocrine systems?

Complete the following analogy-based questions:
$1$. Juxtaglomerular cells of kidney : Erythropoietin :: Atrial wall of heart : .....
$2$. Follicle : Estrogen :: Corpus luteum : .....
$3$. Decrease in glucose utilization at cellular level : Hyperglycemia :: Decrease in blood glucose level : .....
$4$. $\alpha$-cells of pancreas : Glucagon :: $\beta$-cells of pancreas : .....

Consider the following statements about insulin:
$I$. Human insulin is made up of $51$ amino acids arranged in two polypeptide chains.
$II$. The two polypeptide chains are interconnected by two disulphide bridges.
$III$. In mammals,including humans,insulin is synthesized as a pro-hormone,which contains an extra stretch called the $C$-peptide.
$IV$. $C$-peptide is not present in the mature insulin.
Which of the statements given above are correct?

Insulin differs from growth hormone in the context of:

Identify the differences between the following pairs of biological terms:
$(1)$ $RH - IH$
$(2)$ Diabetes insipidus - Diabetes mellitus
$(3)$ Testosterone - Progesterone
$(4)$ Atrial Natriuretic Factor $(ANF)$ - Erythropoietin

Both adrenaline and cortisol are secreted in response to stress. Which of the following statements is true for both of these hormones?