Hole's Human Anatomy & Physiology (Shier), 12th Edition

Ph.I.L.S. 3.0 Quizzing 25: Ph.I.L.S. 3.0 Quizzing

Ph.I.L.S. 3.0 Quizzing

1
AMY has a normal ECG tracing. What does the QRS complex represent?
A)Depolarization of the atria.
B)Depolarization of the ventricles.
C)Repolarization of the ventricles.
2
Which wave in BRIAN's ECG is not normal?
A)The P-wave.
B)The QRS complex.
C)The T-wave.
3
Look carefully at BRIAN's QRS wave. How does it differ from Amy's QRS wave?
A)The QRS complex has a smaller amplitude.
B)The QRS complex is quicker.
C)The QRS complex has two peaks.
4
How does an action potential travel from BRIAN's AV node to the two ventricles?
A)Through the AV bundle and Purkinje fibers.
B)Through nerves.
C)From fiber to fiber, via gap junctions.
5
How could a double R-wave be produced in BRIAN'S ECG?
A)The SA node produces two action potentials, one very soon after the other.
B)The AV node produces two action potentials, one very soon after the other.
C)The two branches of the AV bundle have slightly different conduction velocities.
6
Scroll through CHRIS' ECG tracing. How frequently do the abnormal cycles take place?
A)Every cycle.
B)There is one abnormal then one normal ECG.
C)There is one abnormal then two normal ECGs.
D)There is one abnormal then three normal ECGs.
7
Look at CHRIS' abnormal ECG tracing. Which wave is not present?
A)The P-wave.
B)The QRS complex.
C)The T-wave.
8
If no P-wave is present in CHRIS' ECG, the atria are not contracting. Speculate on the source of the rhythm for the ventricles in the abnormal ECG tracing.
A)The sinoatrial (SA) node.
B)The AV node, the AV bundle, or the Purkinje fibers.
C)The blood passing through the heart stretches, and stimulates, the ventricles to contract.
9
Which waves can you see clearly in DEB's ECG tracing that are at intervals similar to those seen with Amy?
A)The QRS complex and the T-wave.
B)The P-wave and the QRS complex.
C)The P-wave and the T-wave.
10
Notice that the ‘baseline' of DEB's ECG is not flat; it is wavy. If the QRS wave indicates that the ventricles are contracting normally, what creates the wavy line?
A)Multiple P-waves, indicating fibrillation of the atria.
B)Multiple P-waves, indicating fibrillation of the ventricles.
C)Multiple T-waves, indicating fibrillation of the atria.
D)Multiple T-waves, indicating fibrillation of the ventricles.
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