Electrocardiography Biopac© Exercise Test Bank Answers Ch.46 - Laboratory Manual Anatomy & Physiology Cat 4e Test Bank by Terry Martin. DOCX document preview.
Lab Manual for Human Anatomy and Physiology, 4e (Martin)
Chapter 46 Electrocardiography: BIOPAC© Exercise
1) There is a short period of time in the cardiac cycle, in which all four heart chambers are in diastole.
2) Which of the components of the cardiac conduction system briefly delays the signal from the pacemaker, so that the atria have time to fill the ventricles with blood, before the ventricles begin to contract?
A) AV bundle
B) SA node
C) Purkinje fibers
D) Left and right bundle branches
E) AV node
3) During the cardiac cycle, the left atrium and ventricle contract simultaneously, and then the right atrium and ventricle contract at the same time.
4) Functionally, how is cardiac muscle tissue controlled, compared to that of skeletal muscle tissue?
A) Both cardiac and skeletal muscle tissue are controlled by somatic motor neurons.
B) Cardiac muscle tissue is controlled by pacemaker cells within the heart, while skeletal muscle tissue is regulated by somatic motor neurons.
C) Cardiac and skeletal muscle tissue are controlled by both somatic motor neurons and by pacemaker cells within the respective tissues.
D) Both cardiac and skeletal muscle tissue are controlled by pacemaker cells within the respective tissues.
E) Cardiac muscle tissue is controlled by somatic motor neurons, while skeletal muscle tissue is controlled by pacemaker cells within the tissue.
5) Which structure of the cardiac conduction system is considered the final component of the system?
A) SA node
B) AV bundle
C) Purkinje fibers
D) Left and right bundle branches
E) AV node
6) Which portion(s) of the cardiac conduction system is/are found in the right atrium of the heart?
A) SA node and AV node
B) AV bundle and the bundle branches
C) Purkinje fibers
D) AV bundle
E) SA node
7) The ECG is a recording of an action potential of a single cardiac muscle cell.
8) Which components of the ECG lie entirely along the isoelectric line?
A) The intervals and segments
B) The segments
C) The waves and intervals
D) The waves
E) The intervals
9) The largest deflection from the isoelectric line in the ECG is found in the
A) P wave.
B) T wave.
C) T-P segment.
D) QRS complex.
E) P-R interval.
10) Typically, ventricular diastole has a longer duration than ventricular systole.
11) Which of the following is true of the intervals of the ECG?
A) They lie entirely along the isoelectric line.
B) They all contain at least 2 segments.
C) They all contain at least 1 wave and 1 segment.
D) They all contain the QRS complex.
E) They all contain the P wave.
12) The results of the ECG with various leads (arrangements of positive and negative electrodes) are identical, so it does not matter which lead is used.
13) Which of the following portions of the ECG represents ventricular repolarization?
A) The T wave
B) The P-R segment
C) The QRS complex
D) The P wave
E) The P-R interval
14) Typically, the heart rate increases during inspiration, and decreases during expiration.
15) During the cardiac cycle, which mechanical event immediately follows atrial repolarization?
A) Atrial systole
B) Ventricular diastole
C) Ventricular systole
D) Atrial diastole
E) Diastole of all four heart chambers
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Laboratory Manual Anatomy & Physiology Cat 4e Test Bank
By Terry Martin