1. Conductivity is a characteristic shared by all cardiac cells. a. True b. False 2. Cardiac muscle cell groups that function collectively as a unit are known as: a. Syncytia c. Electrical b....

1. Conductivity is a characteristic shared by all cardiac cells.

a. True b. False

2. Cardiac muscle cell groups that function collectively as a unit are known as:

a. Syncytia c. Electrical

b. Refractory d. Bundles

3. Cardiac depolarization may be thought of as the period during which _______ ions rush into the cell.

a. Potassium      c. Sodium

b. Calcium           d. Chloride