During a workshop, a pathophysiology instructor is teaching a group of students about hypothyroidism. Which statement identifies why hypothyroidism is rarely seen in the U.S. (United States)?
Genetic predisposition to the illness is rare in North American populations.
The addition of iodide to salt helps lower the incidence in the US.
There are better screening tools in the U.S. than in other countries.
There are better medications more readily available to US citizens.
The Correct Answer is B
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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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Vertigo and bilateral loss of the pupillary light reflex: Vertigo can occur with cerebellar involvement, but loss of the pupillary light reflex is more associated with brainstem damage.
B. Nuchal rigidity and positive Kernig's sign: These are signs of meningitis, not a cerebellar stroke.
C. Report of falling down, nausea, and vomiting: These symptoms can occur with cerebellar strokes, but they are nonspecific and can be seen in other conditions as well.
D. Difficulty speaking and loss of coordination: The cerebellum is responsible for coordination, and a cerebellar stroke can lead to ataxia (loss of coordination) and dysarthria (difficulty speaking).
Correct Answer is A
Explanation
A. Esophageal varices: Coffee-ground emesis suggests upper gastrointestinal bleeding, which is often due to ruptured esophageal varices in patients with cirrhosis.
B. Colorectal cancer: This condition typically presents with lower gastrointestinal symptoms such as changes in bowel habits or blood in the stool, not coffee-ground emesis.
C. Inflammatory bowel disease: This condition can cause gastrointestinal bleeding but is more commonly associated with symptoms like diarrhea and abdominal pain rather than coffee-ground emesis.
D. Appendicitis: This condition typically presents with right lower quadrant pain, not upper GI bleeding.
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