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Chapter 12 - X I I Chapter 12 Neur a l T issue A Anatomical...

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XII. Chapter 12 – Neural Tissue A. Anatomical Divisions 1. Central Nervous System : consists of the spinal cord and brain. Responsible for integrating processing, and coordinating sensory data and motor commands. 2. Peripheral Nervous System: includes all the neural tissue outside the central nervous system. Consists of cranial nerves and spinal nerves. Delivers sensory information to the CNS and carries motor commands to the peripheral tissues and systems, B. Functional Divisions 1. Afferent Division: pathways that carry impulses toward the CNS. a. receptors: specialized nerve ending that sense something (changes in environment). 2. Efferent Division: carries motor commands away from the CNS to muscles and glands. a. effector: receives the impulse (ex: muscles). b. somatic nervous system: controls skeletal muscle contractions. The impulses go to the skeletal muscles. It is voluntary. c. automatic nervous system: provides automatic regulation of smooth muscles, cardiac muscle, and glandular secretions at the subconscious level. It is involuntary.
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