EKG Palin & SImple Chapter 2 Quiz Review

What electrical event must occur for atrial contraction to occur?

• Atrial depolarization

• Ventricular depolarization

• Atrial repoloarization

• Ventricular repolarization

The cardiac cell at rest has what kind of electrical charge?

• Positive charge

• Negative charge

• Neutral charge

• No charge at all

Th term repolarization refers to the

• Heart's mechanical activity

• Brain's electrical activity

• Heart's electrical activity

• Heart's electrical & mechanical activity

Depolarization is an

• Electrical event that should result in muscle relaxation

• Mechanical event that should result in depolarization

• Electrical event that should result in muscle contraction

• Mechanical event that should result in repolarization

Which of the following ions has a direct effect on ventricular muscle contraction?

• Sodium

• Potassium

• Magnesium

• Calcium

In the action potential phase 0 is

• Depolarization

• Rapid repolarization

• Plateau

• Rest

In the action potential phase 3 is

• Depolarization

• Rapid repolarization

• Plateau

• Rest

Phase 0 of the action potential corresponds with what wave or complex on the EKG?

• T wave

• QRS complex

• U wave

• ST segment

The P wave represents

• Atrial depolarization

• Atrial repolarization

• Ventricular depolarization

• Ventricular repolarization

The QRS complex represents

• Atrial depolarization

• Atrial repolarization

• Ventricular depolarization

• Ventricular repolarization