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Chp. 44 Med-Surg I
Assessment of the Nervous System pg. 922
Question | Answer |
---|---|
Nervous System is composed of? | Peripheral Nervous System and Central Nervous System |
CNS is made up by the | brain and spinal cord |
PNS is composed of | 12 pairs of cranial nerves, 31 pairs of spinal nerves, and the autonomic nervous system |
Autonomic Nervous System is divided into the | Sympothetic and Parasympathetic fibers |
Neurons=transmits impulses | Motor neurons=movement Sensory neurons=senstation |
Neurons are composed of | cell body=soma; short, branching processes=dentrite; a single axon |
Dendrites synapses with another cell body, axon, or dendrite and brings in | information to the cell body from other neurons |
Efferent=impulses away from the cell body (GET AWAY FROM ME!) | Afferent=impulses to the cell body (COME TO ME!) |
Myelinated axons have a gap called the | Nodes of Ranvier |
Sodium and Cloride ions are heavily concentrated where? | outside of the cell (interstitial space) |
Potassium ions are heavily concentrated where? | inside the cell |
Depolarization (impulse conduction)= sodium diffuses through the membrane | Repoloarization (return to baseline)= sodium is pumped out of the cell |