Lecture Oct-25-11 Chapter 16

Lecture Oct-25-11 Chapter 16 - Oct-25-2011 Bio 2870 A &...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Oct-25-2011 Bio 2870 A & P Ch-16 Neural Integration 2 Bio 2870 A & P 1 Introduction to Anatomy and Physiology Chapter 16 Neural Integration II Autonomic Nervous System and Higher–Order Functions Oct-25-2011 Bio 2870 A & P Ch-16 Neural Integration 2 An Introduction to the ANS Figure 16-1 An Overview of Neural Integration. Oct-25-2011 Bio 2870 A & P Ch-16 Neural Integration 2 An Introduction to the ANS Figure 16-2 The Organization of the Somatic and Nervous Systems. Somatic Nervous System (SNS) Operates under conscious control Seldom affects long-term survival SNS controls skeletal muscles Oct-25-2011 Bio 2870 A & P Ch-16 Neural Integration 2 Autonomic Nervous System Autonomic Nervous System (ANS) Operates without conscious instruction ANS controls visceral effectors Coordinates system functions: cardiovascular, respiratory, digestive, urinary, reproductive Figure 16-2 The Organization of the Somatic and Nervous Systems. Oct-25-2011 Bio 2870 A & P Ch-16 Neural Integration 2 Divisions of the ANS Operates largely outside our awareness Has two divisions Sympathetic Division : increases alertness, metabolic rate, and muscular abilities “Kicks in” only during exertion, stress, or emergency “Fight or flight” Parasympathetic Division : reduces metabolic rate and promotes digestion Controls during resting conditions “Rest and digest” Two divisions may work independently Some structures innervated by only one division Two divisions may work together Each controlling one stage of a complex process Oct-25-2011 Bio 2870 A & P Ch-16 Neural Integration 2 Divisions of the ANS Sympathetic Division Preganglionic fibers (thoracic and superior lumbar; thoracolumbar) synapse in ganglia near spinal cord Preganglionic fibers are short Postganglionic fibers are long Prepares body for crisis, producing a “fight or flight” response Seven Responses to Increased Sympathetic Activity Heightened mental alertness Increased metabolic rate Reduced digestive and urinary functions Energy reserves activated Increased respiratory rate and respiratory passageways dilate Increased heart rate and blood pressure Sweat glands activated Oct-25-2011 Bio 2870 A & P Ch-16 Neural Integration 2 Divisions of the ANS Parasympathetic Division Preganglionic fibers originate in brain stem and sacral segments of spinal cord; craniosacral Synapse in ganglia close to (or within) target organs Preganglionic fibers are long Postganglionic fibers are short Rest and repose Parasympathetic division stimulates visceral activity...
View Full Document

This note was uploaded on 12/14/2011 for the course BIO 2870 taught by Professor Spranger during the Spring '08 term at Wayne State University.

Page1 / 72

Lecture Oct-25-11 Chapter 16 - Oct-25-2011 Bio 2870 A &...

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online