Human Anatomy Ch. 13 Test Bank Qs Already Passed

The cranial nerve with a cervical origin (spinal cord) is the ________. A) hypoglossal B) accessory C) vagus D) glossopharyngeal {Ans: accessory}Complicated interlacing of the ventral rami form networks called nerve plexus. The crisscrossing of the nerve fibers from the various spinal nerves is advantageous because ________. A) viruses that infect us by moving through PNS nerves are prevented entry to the CNS B) having several nerve fibers unite enhances motor function C) having several nerve fibers unite enhances sensory function D) injury to any single spinal nerve will be less damaging as there is less chance of total loss of innervation to any particular organ {Ans: injury to any single spinal nerve will be less damaging as there is less chance of total loss of innervation to any particular organ}A fracture of the ethmoid bone could result in damage to which cranial nerve? A) glossopharyngeal B) vagus C) olfactory D) accessory {Ans: olfactory}Spinal nerves exiting the cord from the level of L4 to S4 form the ________. A) lumbar plexus B) femoral plexus C) sacral plexus D) thoracic plexus {Ans: sacral plexus}Dermatome maps are useful to clinicians because ________. A) they can help pinpoint the