LS 2 Review Central Nervous System

LS 2 Review Central Nervous System - LS 2 Review Central...

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I. Organization of the Central Nervous System (CNS): Brain and Spinal Cord a. The brain receives somatic (muscles/voluntary) and visceral (internal/within organ)information. (afferent) b. The brain sends (efferent) commands that can be somatic or autonomic . i. Somatic - SNS is part of the control of voluntary body movements. (PNS) ii. Autonomic -ANS controls part of the peripheral nervous system that acts as a control system functioning largely below the level of consciousness, and controls visceral functions. (Breathing, Heart Beat, Hormone secretion…) Sympathetic and Parasympathetic nervous systems work in opposition , if one increases actions the other deceases. 1. Ex: Fight or Flight: The Sympathetic increases heart rate, blood pressure, and cardiac output in preparing the body for emergency response. The Parasympathetic decreases heart rate, characterized as “rest and digest”. c. Sensory Neurons: are Afferent send information to the CNS. d. Interneurons: Connect neurons within the CNS. e.
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LS 2 Review Central Nervous System - LS 2 Review Central...

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