Low $Ca^{++}$ in the body fluid may be the cause of

What is the function of $ANF$ ? 

$A$ : Our body secretes adrenaline in intense cold.
$R$ : Adrenaline raises metabolic rate.

Which endocrine gland stores its secretion in the extracellular space before discharging it into the blood

Select the correct option on the basis of following sentences : This gland's :

$(I)$ Hormones increase alertness

$(II)$ Hormones increase the heart beat

$(III)$ Stimulate the breakdown of glycogen

$(IV)$ Stimulate the breakdown of lipids and proteins

Deficiency in the activity of adrenal cortex leads to