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
What does the P-R interval represent?
A)the duration of the ventricular action potential.
B)the time between the depolarization of the atria and the depolarization of the ventricles.
C)the time between the repolarization of the atria and the repolarization of the ventricles.
2
Look at your data or click to compare the ECG tracings from Andrew and Brianna. Is Brianna's P-R interval:
A)shorter than Andrew's P-R interval.
B)about the same as Andrew's P-R interval.
C)longer than Andrew's P-R interval.
D)slowly increasing in duration.
3
If you assume that muscle function is normal, what do your data say about conduction through Brianna's AV nodes?
A)The time taken for conduction is shorter than normal.
B)The time taken for conduction is normal.
C)The time taken for conduction is longer than normal.
4
Look at your data or click to compare the ECG tracings from Andrew and Charlie. Is Charlie's P-R interval:
A)shorter than Andrew's P-R interval.
B)about the same as Andrew's P-R interval.
C)longer than Andrew's P-R interval.
D)slowly increasing in duration until the QRS is not recorded.
5
The QRS complex is not present every third cardiac cycle. When the QRS fails:
A)there is communication through the AV node.
B)there is no action potential in the ventricle muscle fibers.
C)the ventricles do not contract.
D)all of the above options are true.
6
Look at your data or click to compare the ECG tracings from Andrew and David. Are the values for David's P-R interval:
A)shorter than Andrew's P-R interval.
B)about the same as Andrew's P-R interval.
C)longer than Andrew's P-R interval.
D)slowly increasing in duration until the QRS is not recorded.
7
If you assume that muscle function is normal, what do your data mean in terms of the through the AV node?
A)The time taken for conduction is shorter than normal.
B)The time taken for conduction is normal.
C)The time taken for conduction is longer than normal.
D)The time taken for conduction gradually increases until conduction fails.
8
Click to compare the ECG tracings from Andrew and Emily. Are the values for Emily's P-R interval:
A)shorter than Andrew's P-R interval.
B)about the same as Andrew's P-R interval.
C)longer than Andrew's P-R interval.
D)non-existent; there is no correlation between the P and QRS waves.
9
Look closely at Andrew's and Emily's P waves and QRS-waves.
A)Emily's P-waves occur at about the same frequency as Andrew's, but the QRS waves occur at a lower frequency.
B)Emily's P-waves occur at about the same frequency as Andrew's, but the QRS waves occur at a higher frequency.
C)Emily's P-waves and QRS waves occur at about the same frequency as Andrew's.
10
Emily's R and QRS waves are not correlated, indicating that there is no communication between the SA and AV nodes. What is the origin of Emily's (slower) QRS rhythm?
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.
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