Hole's Human Anatomy and Physiology (Shier), 13th Edition

Ph.I.L.S. 4.0 Quizzing :

Ph.I.L.S. 3.0 Quizzing

1
The electrocardiogram (ECG) measures:
A)contractions of the atria and the ventricles.
B)the electrical activity of the pacemaker cells.
C)action potentials in the atria and the ventricles.
D)the heart sounds.
2
The QRS wave coincides with:
A)depolarization of the atria.
B)depolarization of the ventricles.
C)depolarization of both the atria and the ventricles.
3
Look at your graph. What is the angle of the heart?
A)About 0 degrees.
B)About 40 degrees.
C)About 65 degrees.
D)About 90 degrees.
4
Does the axis of the heart (a line running from between the atria to the tip of the ventricles) point:
A)out through the left side of the body.
B)out through the right side of the body.
C)horizontally.
D)vertically.
5
What conditions can change the angle of the heart?
A)Exercise.
B)The late stages of pregnancy.
C)Slow breathing.
D)An increase in blood pressure.
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