BB H 432 Lecture Notes - Lecture 4: Sympathetic Nervous System, Walter Bradford Cannon, Adrenal Medulla
Document Summary
Cq: who is walter cannon: the first to document the chemicals and organs responsible for fight or flight. Cannon discovered the importance of the nervous system in regulating homeostasis and response to challenge. He captured the speed of response that was required to mobilize animals to survive. ) What are the parts of your nervous system: nervous, peripheral, autonomic (controls self-regulated action of internal organs and glands) (1) parasympathetic ( calming) (2) sympathetic (arousing, somatic (controls voluntary movements of skeletal muscles) Autonomic nervous system: central (brain and spinal cord, sympathetic nervous system (arousing) Increases heart beat and bp: parasympathetic nervous system (calming, increasing one, decreasing the other! Vi: lead to every part of the body (unlike parasympathetic, easy to remember that when nervous, you sweat, etc. When excited, bp rises ( vasoconstriction ) ; these are sympathetic only: also causes: dry mouth, pupils to dilate, increase heart and respiratory rates to increase oxygen to skeletal muscles, and liver to release glucose.
