The anterior ramus of each spinal nerve sends out communicating rami that connect to
A. the brain.
B. a sympathetic trunk ganglion.
C. the meninges.
D. the vertebrae.
E. the skin and muscles of the back.
Answer: B
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The glossy-white appearance of most axons is due to
A. their proximity to light-reflecting cartilage. B. their proximity to white bone. C. the covering of ependymal cells. D. the high lipid content of the myelin sheath. E. the white color of the perivascular feet.
Oxidation is
a) The removal of protons b) The removal of electrons c) The addition of protons d) The addition of electrons e) None of these choices
What structure, found surrounding PNS axons, is NOT found surrounding CNS axons?
A. Neurilemma B. Myelin sheath C. Plasma membrane D. Nodes of Ranvier
These muscles extend from a superior rib inferomedially to the adjacent inferior rib. They elevate the ribs upon contraction, thereby increasing the transverse dimensions of the thoracic cavity during inhalation.
A. Internal intercostals B. External intercostals C. Scalenes D. Transversus thoracis E. Serratus posterior inferior