BIOL 1080 Study Guide - Final Guide: Parasympathetic Nervous System, Valsalva Maneuver, Posterior Pituitary

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The cns integrates the info coming in. The somatic ns directs voluntary movements (acetylcholine is the major neurotransmitter in this pathway) The autonomic ns regulates involuntary bodily activities. Parasympathetic ns; governs bodily activities during restful conditions (neurotransmitter is acetylcholine) Sympathetic ns; prepares body for stressful situations (neurotransmitter is norepinephrine) Sensory neurons synapse at spinal cord but not all info goes to brain immediately (e. g. the reflex arc allows for a rapid reflex without delay, the brain will still receive info- allows a memory. E. g. when you step on a tack, first response is a reflex, second response is that the brain recognizes the pain. 5 major cell types of the adult human cns (most abundant cells are #2-5, they are sometimes classified together as glial or non-neural cells) Neurons- unidirectional information flow, built for speed. Unmyelinated neurons move at 0. 5 to 2m/sec, myelinated neurons have a large range from 6 to 120m/sec.

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