PS101 Study Guide - Premenstrual Syndrome, Job Performance, Cerebral Cortex
Document Summary
Two main parts: central nervous system (cns)- receives, processes, interprets and stores incoming sensory information. Sends out messages to muscles gland and organs: peripheral nervous system (pns)- handles input and output from the cns. All portions of the nervous system outside the brain and spinal cord. Central nervous system: spinal cord- is a bridge between the brain and parts of the body below the neck, spinal nerves protected by the spinal column, enables spinal reflexes. Peripheral nervous system: contains two subdivisions (messages carried through sensory and motor nerves) Somatic nervous system- nerves connected to sensory receptors and skeletal muscles. Autonomic nervous system- regulates functions of blood vessels, glands and internal organs. Contains two systems: parasympathetic and sympathetic: parasympathetic- to conserve bodily functions (decreased heart rate, decreased respiration, pupils constricted, sympathetic- mobilize or flee (heart races, goosebumps, sweats, pupils dilate, increased respiration) Nervous system made up of: neurons- cells that conduct electrochemical signals; basic unit of the nervous system.
