Lectus

A 12-year-old boy presents to the dentist because of overcrowding of his permanent teeth and difficulty chewing. His mother reports that he sucked his thumb until age 8 and frequently breathed through his mouth due to chronic nasal congestion. Physical examination reveals a narrow, high-arched palate and protrusion of the upper incisors. Which of the following best explains the underlying mechanism responsible for this patient's malocclusion?Deselect Answer

A 68-year-old man with intermittent claudication due to peripheral arterial disease is prescribed cilostazol. He experiences significant improvement in his walking distance after 8 weeks of treatment. The mechanism by which this medication improves symptoms in peripheral arterial disease involves inhibition of which of the following enzymes?Deselect Answer

A group of public health experts wanted to explore the relationships between the quantity of SARS-COV-2 virus and various pharmaceutical drugs by sampling the influent of a wastewater treatment facility. The Pearson correlation coefficient between the quantity of virus and the concentration of one targeted drug was calculated as -0.11, with a p-value of 0.006 and a 95% confidence interval = [-0.198, -0.0225]. Which of the following statements is the best interpretation of these findings?Deselect Answer

A 60-year-old man presents to the clinic with his wife for “weird breathing” during the night. The patient’s wife says that his breathing pattern is irregular, but he does not snore. The patient says he is not aware of these symptoms. Past medical history is remarkable for a non-ST-elevation myocardial infarction (NSTEMI) when he was 50 years old. The patient spends a night at the sleep lab where his tidal volume is monitored overnight. A tracing is shown in the image below. Which of the following is most likely responsible for this patient’s breathing pattern?
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