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15 Cards in this Set

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Objective

Make sure you can identify all the anatomical directions.
See study guide.
Objective

Draw a diagram showing all the divisions of the vertebrate nervous system.
See study guide.
central nervous system (CNS)
Brain and spinal cord
peripheral nervous system (PNS)
Nerves outside the brain and spinal cord
somatic nervous system
Division of the PNS that conveys messages from the sense organs to the CNS and from the CNS to the muscles
autonomic nervous system (ANS)
Division of the PNS that controls the heart, intestines, and other organs
dorsal
Toward the back
ventral
Toward the stomach
spinal chord
Part of the CNS found within the spinal column; the spinal cord communicates with the sense organs and muscles below the level of the head
Bell-Magendie law
Law that states that the entering dorsal roots (axon bundles) carry sensory information and the exiting ventral roots carry motor information
dorsal root ganglion
Clusters of neurons outside the spinal cord, where the cell bodies of the sensory neurons are located
spinal gray matter
Central portion of the spinal cord; consists of densely packed cell bodies and dendrites
spinal white matter
Portion of spinal cord surrounding the spinal gray matter; transmits information from the spinal gray matter toward the brain or other parts of the spinal cord
sympathetic nervous system
Part of the autonomic nervous system (ANS); a network of nerves that prepares the organs for vigorous activity; for example, it increases heart rate and blood pressure, dilates pupils, decreases digestive activity, and increases blood flow to muscles
parasympathetic nervous system
Part of the ANS; facilitates vegetative, non-emergency responses by the organs; for example, it decreases heart rate, decreases blood pressure, pupil constriction, and increases digestive activity