This article will help you to differentiate between sympathetic and parasympathetic nerve fibres. Difference # Sympathetic Nerve Fibre: 1. They arise from thoraco-lumber (T1 to L3) region of the spinal cord. 2. Ganglia are nearer to CNS. The ratio of pre and postganglionic fibres is generally 1: 20 or more. So, the post ganglionic fibers are longer. 3. Neurotransmitters are [...]
After reading this article we will learn about the classification of cholinergic drugs. These are the drugs which produce Ach-like actions, either directly by interactÂing with the cholinergic receptors or indirectly by increasing availability of Ach at these sites. Classification: On the basis of mechanism of action. Organ Selectivity: (i) Ach → all cholinergic organs, more preferably on GIT. (ii) [...]
These drugs block muscarinic receptors only. That's why, it is more appropriate to term them as anti-muscarinic agents. They are also called as atropine-like drugs. Classification of Anticholinergic Drugs: (A) On the Basis of Source: (B) On the Basis of Mode of Action: Sources and Chemistry of Anticholinergic Drugs: Atropine is obtained from Atropa belladonna, and Datura stramonium. Scopolamine is [...]