A patient has recently been diagnosed with multiple sclerosis. Which response best explains the etiology of multiple sclerosis (MS)?
The disease is prevalent in certain geographical locations.
There is a well-defined genetic cause.
Inflammatory processes are responsible for the signs and symptoms.
Ischemic lesions in the brain are responsible for the signs and symptoms.
The Correct Answer is C
A. The disease is prevalent in certain geographical locations: This statement is true but does not explain the etiology of MS. Geographic prevalence does not address the underlying cause.
B. There is a well-defined genetic cause: While genetics may play a role in MS, there is no single well-defined genetic cause for the disease.
C. Inflammatory processes are responsible for the signs and symptoms: MS is an autoimmune disease characterized by inflammation and demyelination of the central nervous system, leading to the signs and symptoms of the disease.
D. Ischemic lesions in the brain are responsible for the signs and symptoms: MS is primarily caused by demyelination rather than ischemic lesions.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. The brain cells became edematous because of a blood to tissue shift of fluid: This describes cerebral edema, which is not typically caused by hyperglycemia.
B. Hyperinsulinemia caused hypoglycemia and a tonic-clonic seizure: The scenario describes hyperglycemia, not hypoglycemia.
C. The brain cells became dehydrated because of fluid shifting out of the cells:. In hyperglycemic hyperosmolar syndrome (HHS), extremely high blood glucose leads to increased serum osmolality, causing water to move out of brain cells, leading to dehydration and altered consciousness.
D. Fluid volume overload caused higher pressure in the brain tissue: Fluid volume overload is not the primary issue in this scenario; rather, dehydration is the concern due to hyperglycemia.
Correct Answer is D
Explanation
A. Hemiparesis of the left arm and leg with nystagmus: A left hemispheric stroke typically affects the right side of the body.
B. Eyelid and mouth drooping on the ipsilateral side: Facial drooping due to a stroke typically occurs on the contralateral side of the body.
C. Homonymous hemianopia of the left visual field of both eyes: A left hemispheric stroke typically causes right-sided homonymous hemianopia.
D. Hemiparesis of the right arm and leg with aphasia: A left hemispheric stroke often results in right-sided hemiparesis and can affect language centers, leading to aphasia.
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