BISC 3221 Chapter 13: Chapter 13 Notes- The Nervous System
16 Aug 2018
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Autonomic nervous system (ans) controls smooth muscle, cardiac muscle, gland activity (these are subdivisions of efferent division: activity of somatic nervous system can be voluntary or involuntary, autonomic nervous system activities are typically outside our awareness/control. Isolate neuron from stimuli other than those at synapses: schwann cells, all peripheral axons (myelinated or not) are covered by these cells, axolemma: plasmalemma of axon, neurolemma: cytoplasmic covering provided by schwann cells around axon. Interoceptors: monitor digestive, respiratory, cardiovascular, reproductive systems, deep pressure, pain, taste: motor neurons, efferent division of nervous system, stimulate/modify activity of peripheral tissue/organ/organ system, efferent fibers: axons of motor neurons. If cut cleanly, this will work; if crushed/torn, recovery can take much longer. 13. 7 synaptic communication: synapse = synaptic terminal + dendrite (axodendritic) or cell body (axosomatic) or axon (axoaxonic, neuroeffector junctions: synapses communicating between neuron and another cell type.
