APK 2100C Lecture Notes - Lecture 9: Central Nervous System, Somatic Nervous System, Autonomic Nervous System

• School: University of Florida
• Department: Applied Physiology and Kinesiology
• Course: APK 2100C
• Professor: Ahlgren Joslyn Korrin

Document Summary

Main controlling and communicating system of body rapid and specific signals make immediate responses by body. Sensory input receptors monitor changes inside and outside body. Integration central nervous system (cns) receives and interprets sensory input and makes decision for action. Motor neurons elicit responses by activating effector organs. Peripheral nervous system (pns) nerves ganglia (neurons outside cns) Sensory (afferent) division somatic (skin/body) and visceral (internal organs) sensory nerve fibers conducts impulses from receptors to cns. Motor nerve fibers conducts impulses from cns to effectors (muscles and glands) Somatic nervous system somatic motor (voluntary) conducts impulses from cns to skeletal muscles. Autonomic nervous system (ans) visceral motor (involuntary) conducts impulses from cns to cardiac and smooth muscles, and glands. Parasympathetic division conserves energy promotes cleanup functions in reset mode. Nervous tissue has excitable cells (neurons) and non-excitable (neuroglia) Conductivity: able to send electrical signals to different part of body (action potential) Extreme longevity: can live and function for lifetime.