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.
Answer:
to understand how negative side effects
might make a person feel
to understand how a new drug might affect
the body
When the immune system attacks itself.
Answer:
D
Explanation:
The white blood cells in you are the guards of the body. They help fight infections that they dont recongize. They also can break down bacteria.
