The Nervous System. Chapters 11-15. General Overview. Master controlling and communications system of the body Rapid & specific electrical impulses cause almost immediate responses. Three overlapping functions :.
The nervous system works in conjuction with the endocrine system to maintain homeostasis.
The electrical impulses of the N.S. cause a more rapid response than the chemical hormones of the endocrine system.
Form myelin sheaths of around nerve fibers of the PNS
Act as protective, cushioning cells
While an action potential is occurring, the sodium channels are open or recovering and another action potential definitely cannot occur. This is often referred to as absolute refractory period.