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

(a)   is the decrease in cell membrane potential that causes the release of the cell’s calcium storage

The ___________ ___________ ____________ goes to the liver

(a)  

When the cell membrane's potential is normal, the heart muscle cell has reached (a)  

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 (a)   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 (a)