Neurotransmitter

Neurotransmitters

Many actions of the body are at some stage regulated by chemical

messengers known as hormones.The major neurotransmitters associated with the

autonomic nervous system are

acetylcholine 3.1,
norepinephrine 3.2
and epinephrine 3.3

(noradrenalin and adrenalin). Their receptors are known as cholinergic and

adrenergic receptors.