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15 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Which of the folowing statements is true of a reflex arc?
a. It always includes at least a sensory and a motor neuron. b. It always has its integrating center in the brain or the spinal cord c. It always terminates in muscle or gland. d. all of the above |
d. all of the above
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none
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The posterior (dorsal) root ganglion contains:
a. cell bodies of motor neurons b. cell bodies of sensory neurons c. cranial nerve axons d. synapses c. all of the above |
b. cell bodies of sensory neurons
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none
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Which sequence best represents the course of a nerve impulse over a reflex arc?
a. receptor,integratng center,sensory neuron, motor neuron, effector b. effector, sensory neuron, integratng center, motor neuron, receptor c. receptor, sensory neuron, integrating center motor neuron, effector d. receptor, motor neuron, integrating center, sensory neuron effector |
C. receptor, sensory neuron, integrating center, motor neuron, efector
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none
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The spinothalamic tracts convey sensory information to the brain regarding:
a. pain b. two-point discrimination c. temperature d. proprioception e. both a and c |
C. temperature
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none
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The spinal cord extends from the _____ ______ of the brain to the level of the __ _____ _____ of the vertebral column.
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medulla oblongata; 2nd lumbar vertebrae
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none
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Lateral extensions of the pia mater that help to protect the spinal cord against displacement are called;
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denticulate ligament
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none
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The order of the meningeal layers from superficial to deep is _____,______,______
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dura mater; arachnoid; pia mater
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none
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Individual nerve fibers are wrapped in a connective tissue covering known as _____. Groups of nerve fibers are held in bundles by ______. The entire nerve is wrapped with _______.
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endoneurium; perineurium; epineurium
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none
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Cell bodies of motor neurons leading to skeletal muscles are located in the ______ gray horns of the spinal cord, while cell bodies of neurons supplying smooth muscle, cardiac muscle or glands lie in the _______ gray horns of the spinal cord.
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anterior; lateral
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none
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Ther are ____ pairs of spinal nerves that emerge from the spinal cord, named and numbered as follows:
____ pairs of cervical nerves, _____ pairs of thoracic nerves, ____pair of lumbar nerves, ____ pair of sacral nerves, ____ pair of coccygeal nerves. |
31, 8, 12, 5, 5, 1
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none
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True or False
Cell bodies of motor neurons are located in the posterior (dorsal) root ganglia. |
F
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none
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The anterior median fissure is the deeper wider longitudinal groove on the external surface of the spinal cord. T or F
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T
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none
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The tapering inferior end of the spinal cord at the level of the first two lumbar vertebrae is called the conus medullus. T or F
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T
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none
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The main functions of the spinal cord are that it serves as a reflex center and it is the site where sensations are felt. T or F
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F
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none
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A tract is a bundle of nerve fibers inside the central nervous system.
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T
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none
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