PHSI 208 Chapter 11: PHSI 208.6 Chapter 11 Notes (VC15)
Document Summary
Chapter 11: efferent division autonomic & somatic motor control. Somatic motor neurons control skeletal muscles and are mostly voluntary. Autonomous means self- governing, therefore it is referring to involuntary processes. Control of smooth and cardiac muscle, many glands, lymphoid, and some adipose tissues are examples. There are 2 branches of the autonomic nervous system: Autonomic neurons work with endocrine and behavioural systems to maintain homeostasis. Homeostasis is a dynamic balance between the autonomic branches. *most organs are controlled by either sympathetic or parasympathetic activity. Sympathetic and parasympathetic activity originate in different regions of the cns. Anatomical differences are the pathway point of origin in the cns, and the location of the autonomic ganglia. Organized in 2 ganglion chains, side-by-side of the spinal column (bilateral; 1 on left, 1 on right), with additional ganglia along the descending aorta. These chains are close to the spinal cord and synapse with neurons that create efferent function.
