A nurse is assisting with teaching a group of nursing students about the pathophysiology of the spinal cord. Which of the following statements by a nursing student indicates understanding?
"The ascending tract of the spinal cord processes information in the brain."
"The descending tracts of the spinal cord deliver the CNS motor information to neurons in the muscle."
"The sensory receptors are in the muscles."
"The motor neurons are in the dermal layer of skin."
The Correct Answer is B
A. The ascending tract of the spinal cord transmits sensory information to the brain, but it does not process it; processing occurs in the brain itself.
B. This statement accurately describes the function of the descending tracts, which carry motor commands from the central nervous system (CNS) to the muscles, facilitating movement.
C. Sensory receptors are located in various tissues throughout the body, including the skin, not just in the muscles.
D. Motor neurons are not found in the dermal layer; they are located in the spinal cord and the peripheral nervous system, where they innervate muscles.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. A positive result in a Tensilon test is indicated by a temporary improvement in muscle strength following the administration of edrophonium (Tensilon), which confirms the diagnosis of myasthenia gravis.
B. A "pill-rolling" tremor is associated with Parkinson's disease and is not a relevant finding in myasthenia gravis or the Tensilon test.
C. The Tensilon test assesses muscle strength rather than electrical charge in the muscle; therefore, an increase in electrical activity is not a relevant measure for this test.
D. No change in muscle strength indicates a negative result for myasthenia gravis, suggesting that the test did not confirm the diagnosis.
Correct Answer is B
Explanation
A. A sedentary lifestyle is a risk factor for various cardiovascular diseases but is not specifically associated with pericarditis.
B. A recent flu-like illness can increase the risk of viral infections, which are common causes of pericarditis, making it an important risk factor to mention.
C. Thyroid disease can influence cardiovascular health but is not a direct risk factor for developing pericarditis.
D. While a family history may indicate a predisposition to some heart diseases, there is no strong association with pericarditis specifically.
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