Which response best connects the pathology of myasthenia gravis with its signs and symptoms (S&S)?
A sudden, explosive, disorderly charge of neurons causes a transient aberration in brain function
Loss of the myelin sheath surrounding peripheral nerves causes asymmetric weakness
Destruction of acetylcholine receptors causes muscle weakness with prolonged activity.
A bacterial inflammatory illness that causes headache and photophobia.
The Correct Answer is C
A. A sudden, explosive, disorderly charge of neurons causes a transient aberration in brain function: This describes the pathophysiology of seizures, not myasthenia gravis.
B. Loss of the myelin sheath surrounding peripheral nerves causes asymmetric weakness: This describes multiple sclerosis, not myasthenia gravis.
C. Destruction of acetylcholine receptors causes muscle weakness with prolonged activity: Myasthenia gravis is an autoimmune disease where antibodies attack acetylcholine receptors at the neuromuscular junction, leading to muscle weakness, especially after repeated use.
D. A bacterial inflammatory illness that causes headache and photophobia: This describes meningitis, not myasthenia gravis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Elevating the head of the bed promotes venous return and helps increase the ICP: This is incorrect. Elevation of the head of the bed helps to decrease intracranial pressure (ICP) by promoting venous drainage rather than increasing it.
B. Elevation of the head of the bed aids in maintaining cerebral perfusion: Elevating the head of the bed helps to decrease ICP, which in turn aids in maintaining adequate cerebral perfusion pressure.
C. Elevation of the head of the bed will increase intracranial pressure (ICP): This is incorrect. Elevation of the head of the bed is intended to reduce ICP, not increase it.
D. The nurse should keep the head of the bed flat to ensure adequate arterial circulation: This is incorrect. Keeping the head of the bed flat can increase ICP, which is counterproductive in managing intracranial pressure.
Correct Answer is B
Explanation
A. Several episodes of black and tarry stools: This indicates melena, which is typically associated with upper gastrointestinal bleeding, not specifically Crohn's disease.
B. Several episodes of hematochezia per day: Hematochezia (fresh blood in stools) can occur in Crohn's disease due to inflammation and ulceration in the intestines.
C. Post-alcohol ingestion epigastric pain: This is more commonly associated with gastritis or peptic ulcer disease, not Crohn's disease.
D. An oral temperature of 102°F: While fever can occur in Crohn's disease during acute flare-ups, it is not a specific or definitive symptom of the condition. The primary symptoms are gastrointestinal in nature, such as abdominal pain and altered bowel habits.
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