USMLE Step 1 Quiz
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PHARMACOLOGY
Question 1 of 19
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A 55-year-old woman has been taking propranolol, a non-selective beta-blocker, for the management of essential tremor for several years. She decides to abruptly stop her medication without consulting her physician. Two days later, she presents to the emergency department with palpitations, severe anxiety, and a heart rate of 130/min.
This patient's symptoms are most likely due to which of the following changes in her adrenergic receptors during long-term therapy?
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