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.

Answer and Explanation

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.

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Correct Answer is D

Explanation

A. Occurs when you are physically and psychologically exhausted: An aura is a specific set of symptoms that precedes the headache, not related to exhaustion.

B. Occurs in the postdrome and causes you to feel sleepy and weak: The postdrome phase is after the headache, and an aura occurs before the headache.

C. Is a trigger such as a stressful event, that is the cause of the headache: An aura is not a trigger but rather a symptom experienced before the headache begins.

D. An aura is a warning, such as an unpleasant smell, before the headache begins: An aura is a neurological phenomenon that can include visual disturbances, unusual smells, or other sensory changes occurring before the onset of a migraine.

A. Genetic predisposition to the illness is rare in North American populations. B. The addition of iodide to salt helps lower the incidence in the US. C. There are better screening tools in the U.S. than in other countries. D. There are better medications more readily available to US citizens.

Correct Answer is B

Explanation

A. Decreased respirations and CO2 retention: A thyrotoxic crisis (thyroid storm) typically involves increased, not decreased, respiratory rates and CO2 retention due to increased metabolic activity.

B. Seizures and extreme tachycardia: Thyrotoxic crisis is characterized by severe symptoms including extreme tachycardia, fever, and potentially seizures due to excessive thyroid hormone levels.

C. Constipation and a swollen abdomen: Constipation and abdominal swelling are more typical of hypothyroidism rather than a thyrotoxic crisis.

D. Hypotension and bradycardia: Thyrotoxic crisis usually causes tachycardia and hypertension rather than bradycardia and hypotension.

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A patient has recently been diagnosed with multiple sclerosis. Which response best explains the etiology of multiple sclerosis (MS)?

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Naxlex Comprehensive Predictor Exams

A clinic nurse asks her patient who suffers from migraine headaches if she experiences an aura before the headache begins. The patient appears confused and asks "What is an aura?". Which statement is true? "An aura

Correct Answer is D

Explanation

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Correct Answer is B

Explanation

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