The liver is in the

When a chemical stress test is performed using Persantine, adenosine, or a similar chemical, how does the chemical affect the patient?

A. It relaxes the heart. B. It changes the heart's rhythm from atrial fibrillation to normal sinus rhythm. C. It stimulates the patient so he or she can exercise longer. D. It mimics the stresses placed on the heart during exercise.

Research indicates that "clustering" occurs when athletes in certain sports

A. sit together in their classes. B. are over-represented in specific courses and majors. C. join the same fraternities and go to the same parties. D. get the same grades even when take different courses.