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NERVOUS SYSTEM - NERVOUS SYSTEM Master controlling and...

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NERVOUS SYSTEM Master controlling and communicating system. With the endocrine system, it is responsible for regulating and maintaining body homeostasis. The cells communicate by means of electrical signals, which are rapid, specific, and cause an almost immediate response. Three overlapping functions: 1. Uses sensory receptors to monitor changes in the environment. 2. Processes and interprets the sensory input and makes a decision. 3. Effects a response. Organization of the Nervous System The nervous system is divided into two principal parts: Central Nervous System (CNS): consists of the brain and spinal cord. Integrating and command center. It interprets in coming sensory information. Dictates responses based on past experience, reflexes, and current conditions. Peripheral Nervous System (PNS): consists mainly of the nerves that extend from the brain and spinal cord. Spinal nerves carry impulses to and from the spinal cord. Cranial nerves carry impulses to and from the brain.
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