Lab Practical 2

True or false? Prior to contraction, a cardiac muscle cell must depolarize

• True

• False

Systole is the heart muscle _____________.

• contracting

• relaxing

Diastole is the heart muscle ____________

• relaxing

• contracting

_________________ is the decrease in cell membrane potential that causes the release of the cell’s calcium storage

The ___________ ___________ ____________ goes to the liver

When the cell membrane's potential is normal, the heart muscle cell has reached __________________

Select the correct statement

• The atria and ventricles depolarize and repolarize as two large units because if gap junctions

• the heart depolarizes by doing all together in one unit

• all the heart cells individually depolarize and repolarize separately

A ______________ is a machine that records the repolarization and depolarization of the atria and ventricles

• EKG

• ECG

• electrocardograph

• electrocardiogram

Electrical potentials are created by conducting to the skin’s surface (bc of the high _______________ content of the body plasma and interstitial fluid)

The graphic recording of the amplitude of depolarizing and repolarizing potentials from an electrocardiograph is called a ________________