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+ Nervous System
Anatomy
Question | Answer |
---|---|
Generally conducts impulses away from cell body | axon |
releases neurotransmitters | axon terminal |
conducts electrical currents toward the cell body | dendrite |
increases the speed of impulse control down the axon | myelin sheath |
location of the nucleus | cell body |
T/F Neuroglia support, insulate and protect cells | True |
T/F Neuroglia demonstrate irritability and are able to excite or inhibit other cells | False - neurons |
Releases neurotransmitters | neurons |
chemical messengers | neurotransmitters |
T/F Neuroglia are non-excitable in and of themselves | True |
Nerves or neuroglia? Able to divide, nucleus contains centrioles | neuroglia |
Nerve or Neuroglia? Nucleus contains endoplasmic reticulum; non-reproductive cells | neurons |
Structural divisions of the nervous system | Central (brain) and Peripheral (sensory afferent, motor efferent) |
4 primary structures of the brain | cerebellum, cerebrum, diencephalon, brainstem |
4 major nerve plexuses | cervical, brachial, lumbar, sacral |
Regional nerves in the cervical plexus | phrenic, muscular, lesser occipital |
Regional nerves in the brachial plexus | axillary, medial, radial, ulnar |
Regional nerves in the lumbar plexus | femoral, obturator, ilioinguinal |
Regional nerves in the sacral plexus | sciatic, tibial, common fibular |
Major anatomical structures in the cerebrum | 2 hemispheres, gyri and sulci, cortex (grey matter), white matter, basal nuclei |
Major anatomical structures in the cerebellum | posterior to the brainstem, inferior to the cerebrum |
Major anatomical structures in the diencephalon | superior to the brain stem, contains thalamus, hypothalamus, pituitary gland, pineal gland |
Major anatomical structures in the brain stem | pons, midbrain, medulla oblongata, home of the reticular activating system, connects spinal cord to brain |