$5$-Hydroxytryptamine ($5$-$HT$) is known as:

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

Intercellular communication in multicellular organisms occurs through

Match the following columns:

Column-$I$	Column-$II$
$P$. Anterior Pituitary	$I$. $MSH$
$Q$. Intermediate Pituitary	$II$. $ADH$
$R$. Posterior Pituitary	$III$. $LH$
	$IV$. $FSH$
	$V$. $GH$
	$VI$. Oxytocin
	$VII$. $PRL$
	$VIII$. $TSH$
	$IX$. $ACTH$

Which of the following hormones affect carbohydrate metabolism?

Given below are two statements. Read them and choose the correct pair below.
Statement-$I$: Melatonin regulates the sleep-wake cycle,body temperature,metabolism,and reproductive cycles.
Statement-$II$: Thyroxin increases the action of neurotransmitters and supports the $RBC$ production.