In a patient with uncontrolled hypertension, the left ventricular myocardium undergoes an increase in cell size and protein content, leading to a thickened ventricular wall. This cellular adaptation is best described as which of the following?

The correct answer to the question "In a patient with uncontrolled hypertension, the left ventricular myocardium undergoes an increase in cell size and protein content, leading to a thickened ventricular wall. This cellular adaptation is best described as which of the following?" is Option D: Hypertrophy.

The other options — A) Atrophy, B) Hyperplasia, C) Metaplasia — are incorrect for this USMLE Exam Prep question. As explained above: Hypertrophy is an increase in the size of cells, resulting in an increase in the size of the organ. In the heart, it's often a response to increased workload, such as from hypertension.