BIO 205 Lecture Notes - Lecture 15: Sweat Gland, Vasoconstriction, Vellus Hair
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16 Mar 2017
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The central nervous system (cns) is composed of the brain and spinal cord. The peripheral nervous system is composed of the nerves of the body. Sensory neurons within peripheral nerves carry impulses from receptors to the cns, whereas motor neurons carry impulses from the cns to effectors. The effectors of the body are muscles (smooth, cardiac, skeletal) and glands (endocrine, exocrine). In the body, there are two systems involved with the motor division: somatic nervous system, autonomic nervous system (ans) The somatic nervous system is involved with voluntary control of specific bodily functions. For example, the musculoskeletal system is voluntary and is thus controlled by the somatic nervous system. The term autonomy means self governing and thus, the autonomic nervous system (ans) is the subset of the motor division responsible for self regulated bodily functions. The ans is responsible for the control of smooth muscle, cardiac muscle, endocrine glands and exocrine glands.
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