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Nervous System (Part I)

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Christopher Perumalla

Nervous System1Overview of the nervous system2Cells of the nervous system3Establishment of the resting membrane potential1Overview of the Nervous SystemThe nervous system is divided into the central nervous system CNS and the peripheral nervous system PNS The CNS consists of the brain and the spinal cord and it receives and processes information from organs and sends information back to organs with instructions to perform certain tasksThe CNS is also the site for learning emotion memory and other important functionsPNS is made up of nerve cells that provide communication between the CNS and the organs throughout the body The PNS is subdivided into the Afferent and Efferent information The Afferent information transmits information from organs to CNS which include the sensory information touch smell vision sound and the information pertaining to the internal environment blood pressure hunger level etc The nerve cells of the efferent division carry information from the CNS to the organs in the effector organs The somatic nervous system consists of nerve cells that regulate skeletal muscle contraction while the autonomic nervous system consists of nerve cells that regulate internal and other structures such as sweat glands blood vessels and other activities that are not part of the voluntary control
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