Compose 400 words or more discussion to respond the following: How many pairs of spinal nerves are there? Can you name them? What is a plexus? Name the four major pairs of plexuses. What is a dermatome? A myotome? List the names and numbers of the 12 pairs of cranial nerves. Mention the primary function of each pair cranial nerves. Distinguish among a motor nerve, sensory nerve and mixed nerve. What is the principle of autonomic antagonism? Give an example. Which division of the Autonomic Nervous System (ANS) is the dominant controller of autonomic effectors when the body is at rest? Name the two major types of cholinergic receptors and the two major types of adrenergic receptors. What is the difference between a cholinergic fiber and an adrenergic fiber? Between a cholinergic receptor and an adrenergic receptor?