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Unit 4 Chapter 13
Assessment
| Question | Answer |
|---|---|
| Which of the following is contained within gray matter? | Cell bodies, dendrites, and proximal parts of axons of neurons |
| Voluntary motor impulses leave the spinal cord via the _________blank of gray matter. | anterior horn. |
| Which of the following is not considered a region of the spinal cord? Cervical Thoracic Lumbar Pelvic Sacral | Pelvic |
| Which of the following sensory functions involves neurons in the posterior root ganglion? Smell Hearing Touch Taste Vision | Touch |
| The bundle of nerve roots that occupy the vertebral canal from L2 to S5 is called the _________blank. | cauda equina |
| Which of the following is not a function associated with the spinal cord? | Protect neurons in both the ascending and descending tracts |
| Which of the following structures is the richest in lipid content? | White matter |
| The upper motor neurons that control skeletal muscles begin with a body in the _________. | motor association cortex of the cerebrum/ precentral gyrus of the cerebrum |
| Which of the following fractures would be the least likely to cause a spinal cord injury? | A fracture of vertebra L4 |
| Motor commands are carried by _________ from the brain along the spinal cord. | descending tracts |
| The structure found between the posterior rootlets and the posterior root ganglion is called the _________. | posterior root of a spinal nerve |
| A patient with no sensation in the left thumb would most likely have nerve damage of the _________ spinal nerve. | C6 |
| "Somatosensory" does not refer to sensory signals from _________. | the viscera |
| Which of the following is not a distal branch of the spinal nerve? | posterior root |
| mixed nerve consists of both _________ and _________. | afferent; efferent fibers |
| Which of the following branches of a spinal nerve has the cell bodies of only sensory neurons? | Posterior (dorsal) root |
| There are _________ pairs of spinal nerves. | 31 |
| The anterior rami of the spinal nerves form nerve plexuses in all regions except the _________ region(s). | thoracic |
| Cell bodies of the anterior root are located in the _________. | gray matter |
| Nerve fibers are insulated from one another by _________blank. | endoneurium |
| A ganglion is a _________blank. | cluster of cell bodies in the PNS |
| Which of the following nerves originates in the lumbosacral plexus? Axillary Sciatic Phrenic Ilioinguinal Obturator | Sciatic |
| The cervical plexus is the origin of the _________blank nerve(s). | phrenic |
| A _________ is a cordlike organ composed of numerous _________. | nerve; axons |
| The connective tissue that surrounds a nerve fascicle is called the _________. | perineurium |
| Many upper motor neurons synapse with lower motor neurons in the _________. | anterior horn |
| Eyes and ears are innervated by _________ fibers. | special |
| Which of the following is comprised of anterior rami from C5-T1? | Brachial plexus |
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