The right answer is Electrocardiography (or Electrocardiogram).
In a typical plot, one can notice five characteristic waves. They are called P, Q, R, S and T. The illustration below shows what a normal electrocardiogram looks like:
* the P wave marks the depolarization during the contraction of the atria;
* the PR interval indicates the time required to transmit the electrical impulse of the sinus node of the atria to the ventricular muscles;
* the QRS complex marks depolarization and ventricular contraction;
* the QT interval corresponds to the global ventricular repolarization;
* T wave refers to the end of ventricular repolarization.
I believe the answer is: C. A healthy high school wrestler is using anabolic steroids to build muscle mass.
It is indeed true that anabolic steroid would increase both the strength and the speed for the athletes. But in the long run, those athletes would face various side effects, such as baldness, decreasing size of testicles, impotency , or in some cases it might lead to stroke.
•Making a recipe and getting several meals out of it
