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
In this lab, contractions of the heart produced upward deflections of the line tracing. Was the deflection produced by the contracting ventricle:
A)smaller than that produced by the contracting atria?
B)about the same size as that produced by the contracting atria?
C)larger than that produced by the contracting atria?
2
Look at your data. In the first part of the lab, when no thread was tied around the heart, the time interval between atrial contractions was:
A)much shorter than the time interval between ventricle contractions.
B)about the same as the time interval between ventricle contractions.
C)much longer than the time interval between ventricle contractions.
3
When thread was tied across the two atria, the line tracing:
A)did not change when compared with the tracing from the normal heart.
B)showed that just the ventricle was contracting.
C)showed that just the atria were contracting.
D)showed that just the ventricle and the atria were contracting asynchronously.
4
When thread was tied across the two atria and produced only atrial contractions, was the time interval between the atrial contractions:
A)significantly shorter than the time interval between atrial contractions recorded from the normal heart.
B)about the same as the time interval between atrial contractions recorded from the normal heart.
C)significantly longer than the time interval between atrial contractions recorded from the normal heart.
5
When thread was tied across the sulcus, the line tracing:
A)did not change when compared with the tracing from the normal heart.
B)showed that just the ventricle was contracting.
C)showed that just the atria were contracting.
D)showed that just the ventricle and the atria were contracting asynchronously.
6
When thread was tied across the sulcus and the atria and ventricle contracted asynchronously, was the time interval between the atrial contractions:
A)significantly shorter than the time interval between atrial contractions recorded from the normal heart.
B)about the same as the time interval between atrial contractions recorded from the normal heart.
C)significantly longer than the time interval between atrial contractions recorded from the normal heart.
7
If the time between atrial contractions was independent of experimental manipulation, where is the pacemaker for atrial contractions?
A)The sinoatrial (SA) node.
B)The atrioventricular (AV) node.
C)The atrioventricular (AV) bundle (or bundle of His).
D)The Purkinje fibers.
8
When thread was tied across the sulcus and the atria and ventricle contracted asynchronously, was the time interval between ventricle contractions:
A)significantly shorter than the time interval between ventricle contractions recorded from the normal heart.
B)about the same as the time interval between ventricle contractions recorded from the normal heart.
C)significantly longer than the time interval between ventricle contractions recorded from the normal heart.
9
When thread was tied across the sulcus and the atria and ventricle contracted asynchronously:
A)the atria and ventricle were excited by the pacemaker in the SA node.
B)only the occasional action potential made its way through the AV node to excite the ventricle.
C)the pacemaker for the (less frequent) ventricle contractions was not in the SA node.
10
When thread was tied across the sulcus and the atria and ventricle contracted asynchronously, the pacemaker for the (slower) ventricle contractions was:
A)in the sinoatrial (SA) node.
B)in the AV node, the AV bundle, or the Purkinje fibers.
C)created by blood as it stretched the wall of the ventricle.
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