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The Nervous Syste5 - The Nervous System Nervous Tissue...

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The Nervous System & Nervous Tissue Nervous System Function: - Sensory Input : sensory receptors detect internal stimuli, & send information to central nervous system - Integration : nervous system processes information & makes decisions for appropriate responses - Motor Output : motor neurons carry information about decision to effectors (muscle cells, glands) to generate response Organization of the Nervous System Central Nervous System (CNS): brain & spinal cord Peripheral Nervous System (PNS): nerves that extend from the CNS (outside the CNS) - Sensory (afferent) division: nerves that convey impulses to the CNS from sensory receptors o sensory neurons link body parts to CNS o somatic afferent fibers: convey impulses from skin, skeletal muscles & joints o visceral afferent fibers: convey impulses from visceral organs (organs of ventral body cavity) - Motor (efferent) division: transmits impulses from the CNS to effector organs (muscles & glands) o motor neurons activate muscle contraction & glandular secretion o somatic nervous system (
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