Module 3 Quiz Online

45 Questions | By Nate7779 | Updated: Mar 21, 2022 | Attempts: 118

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Module 3 quiz for Online EKG Technician Program Each of the questions or incomplete statements below is followed by suggested answers or completions. Select the one answer that is best in each case. You must obtain a 80% to pass and you will not be able to review your answers

Questions and Answers

1.

What electrical event must occur for atrial kick to occur?
- A.
  
  Atrial depolarization
- B.
  
  Ventricular depolarization
- C.
  
  Atrial repolarization
- D.
  
  Ventricular repolarization
2.

T or F. The polarized cardiac cell is electrically negative.
- A.
  
  True
- B.
  
  False
3.

T or F. During the absolute refractory period, only a strong stimulus can result in depolarization.
- A.
  
  True
- B.
  
  False
4.

T or F. Cardiac cell stimulus during the absolute refractory period often results in very fast,
- A.
  
  True
- B.
  
  False
5.

T or F. The P wave represents atrial depolarization.
- A.
  
  True
- B.
  
  False
6.

T or F. The PR segment is a flat line located between the QRS complex and the T wave.
- A.
  
  True
- B.
  
  False
7.

T or F. The baseline is a flat line from which the waves and complexes take off
- A.
  
  True
- B.
  
  False
8.

T or F. The normal pacemaker of the heart is the AV node.
- A.
  
  True
- B.
  
  False
9.

T or F. The normal rate of the sinus node is 60–100 beats per minute.
- A.
  
  True
- B.
  
  False
10.

The cardiac cell at rest has what kind of electrical charge?
- A.
  
  Positive charge
- B.
  
  Negative charge
- C.
  
  Neutral charge
- D.
  
  No charge at all
11.

The EKG is a recording of the
- A.
  
  Heart’s mechanical activity.
- B.
  
  Brain’s electrical activity.
- C.
  
  Heart’s electrical activity.
- D.
  
  Heart’s electrical and mechanical activity.
12.

Depolarization is a(n)
- A.
  
  Electrical event that should result in muscle relaxation.
- B.
  
  Mechanical event that should result in depolarization.
- C.
  
  Electrical event that should result in muscle contraction.
- D.
  
  Mechanical event that should result in repolarization.
13.

Which of the following is NOT TRUE?
- A.
  
  Cardiac cells can contract without having been depolarized.
- B.
  
  Cardiac cells must be depolarized before they can contract.
- C.
  
  Cardiac contraction occurs as a result of phase 0 of the action potential.
- D.
  
  Cardiac contraction requires the presence of calcium ions.
14.

Which of the following ions has a direct effect on the strength of cardiac contraction?
- A.
  
  Sodium
- B.
  
  Potassium
- C.
  
  Magnesium
- D.
  
  Calcium
15.

In the action potential, phase 0 is
- A.
  
  Depolarization.
- B.
  
  Plateau.
- C.
  
  Rapid repolarization.
- D.
  
  Rest.
16.

In the action potential, phase 3 is
- A.
  
  Depolarization
- B.
  
  Rapid repolarization.
- C.
  
  Plateau
- D.
  
  Rest.
17.

Phase 0 of the action potential corresponds with what wave or complex on the EKG?
- A.
  
  T wave
- B.
  
  QRS complex
- C.
  
  U wave
- D.
  
  ST segment
18.

The relative refractory period extends from the
- A.
  
  Beginning of the T wave to the beginning of the next QRS complex.
- B.
  
  Beginning of the P wave to the beginning of the QRS complex.
- C.
  
  Beginning of the QRS complex to the upstroke of the T wave.
- D.
  
  Upstroke of the T wave to the end of the T wave.
19.

Which of the following correctly describes the relative refractory period?
- A.
  
  It is the period in which even a weak impulse can cause another depolarization.
- B.
  
  It is the period in which only a strong impulse can cause another depolarization.
- C.
  
  It is the period in which no impulses at all can cause another depolarization.
- D.
  
  It is the period in which the heart function stops temporarily to allow impulse transmission to occur.
20.

The P wave represents
- A.
  
  Atrial depolarization.
- B.
  
  Atrial repolarization
- C.
  
  Ventricular depolarization
- D.
  
  Ventricular repolarization.
21.

The QRS complex represents
- A.
  
  Atrial depolarization.
- B.
  
  Atrial repolarization.
- C.
  
  Ventricular depolarization.
- D.
  
  Ventricular repolarization.
22.

The T wave represents
- A.
  
  Atrial depolarization.
- B.
  
  Atrial repolarization.
- C.
  
  Ventricular depolarization.
- D.
  
  Ventricular repolarization.
23.

The PR segment is located between the
- A.
  
  P wave and the QRS complex.
- B.
  
  QRS complex and the T wave.
- C.
  
  T wave and the next P wave.
- D.
  
  P wave and the T wave.
24.

The ST segment is located between the
- A.
  
  P wave and the QRS complex.
- B.
  
  QRS complex and the T wave.
- C.
  
  T wave and the next P wave.
- D.
  
  P wave and the T wave.
25.

The normal ST segment is
- A.
  
  At the isoelectric line.
- B.
  
  Elevated above the isoelectric line.
- C.
  
  Depressed below the isoelectric line.
- D.
  
  Both above and below the isoelectric line.