PHED-2506EL Lecture Notes - Lecture 8: Autonomic Nervous System, Spinal Nerve, Cranial Nerves
14 Dec 2018
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Lecture 8: fundamentals of nervous system and nervous tissue part i. Master controlling and communication system of body. Nervous system has three overlapping functions: sensory input: info gathered by sensory receptors about internal and external changes, integration: processing and interpretation of sensory input, motor output: activation of effector organs (muscles and glands) produces a response. Example: driving and see a red light ahead: sensory input, nervous system processes this info (integration, your foot hits the brake (motor output) Pns: two subdivisions: sensory (afferent) division, motor (efferent) division. Motor division: stands for carrying away: transmits impulses from the cns to effector organs, muscles (contract, glands (secrete, two main parts, somatic nervous system. Impulses from cns to skeletal muscles: voluntary nervous system , autonomic nervous system, regulates activity of smooth and cardiac muscles and glands, involuntary nervous system , two subdivisions: sympathetic and parasympathetic. Neurons (nerve cells): excitable cells that transmit electrical signals.
