Electrocardiogram

During ____ wave, SA nodes send impulses to both atria before they contract.

• P

• QRS

• T

• PT

What is the name of the wave that represents the depolarization of the ventricles in an ECG?

• P wave

• QRS complex

• T wave

• ST segment

Which part of the ECG represents the repolarization of the ventricles?

• P wave

• QRS complex

• T wave

• ST segment

What does the PR interval on an ECG represent?

• Time taken for atrial depolarization

• Time taken for ventricular depolarization

• Time taken for ventricular repolarization

• Time taken for atrial repolarization

Daniel ran for his life during marathon, the partial pressure of CO2 increased, this will

• increase the pH

• decrease the concentration of H+ in the blood

• increase the concentration of H+ in the blood

• decrease the partial pressure of CO2

Increase in H+ concentration will lower the blood pH, this will _____

• decrease the heart beat

• decrease the blood pumped to the lungs

• increase the blood pumped to the lungs

• heartbeat will be irregular

Which graph will likely show Daniel ECG during the exercising?

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