Pharmacology

Differences between Somatic Nervous System (SNS) and Autonomic Nervous System (ANS)   Table 1: Provide the major differences available between SNS and ANS     The fig.1 provide the basic information about the arrangements of neurons with respect to the tissues in SNS and ANS     Fig. 1 Representation of Somatic motor nerve and the efferent nerve of the ANS. The principle neurotransmitters, acetylcholine (ACh) and norepinephrine (NE) are shown in red.The receptor for these neurotransmitters, nicotinic (N) and muscarinic ( M) cholinergic receptors, α and β adrenergic receptors are shown in green.The somatic nerve directly innervate the skeletal muscle (without any ganglionic relay).The autonomic efferent nerves innervated secretory glands, smooth muscle, and cardiac tissue. Both parasympathetic and sympathetic divisions have ganglia where ACh is the neurotransmitter of pre-ganglionic neurons.ACh acts on nicotinic receptors on post-ganglionic neurons.ACh is also the neur