Unformatted text preview: 23. The T wave of the ECG occurs at the identical time of: Q atrial depolarization P - (“MM 0W ventricular repolarization “A? . t 910
C . ventricular contraction DRE ' v we. do.
D. ventricular relaxation _ i
E. AV node depolarization T V?) 24 The event that comes immediately before the ﬁrst heart sound would be the: P wave
. T wave D. isovolumetric relaxation
E. closing of the semilunar valves.
The blood vessel type with the lowest proportion of smooth muscle is the:
A. artery 5
arteriOleFl/“lhvﬂr (mt M41 WV thK
E vein cart rhythm with a longer-than-normal P—R interval before every QRS wave suggest;
sinus bradycardia \ﬁ . sinus tachycardia
v “ ventricular tachycardia
Q ﬁrst degree heart block ( 2 . The lymphatic system in a healthy person transports:
A. all of the following answers ﬁltered protein
. red blood cells y During exercise, the:
A. pressure, cardiac output (CO), and total peripheral resistance (T PR) all increase.
B. pressure and TPR increase and the C0 decreases. pressure decreases and the CO and the TPR both increase.
. CO increases and TPR decreases. 29 'ncrease in EDV (end—diastolic volume) is most closely related to:
an increase in venous return.
C. an increase in arterial pressure.
a decrease in arterial pressure.
a decrease in TPR (total peripheral resistance). 30. The main effect of PNS (parasympathetic nervous system) activity to the heart is a:
A. positive inotropism (increased strength of contraction)
Br negative inotropism (decreased strength of contraction) positive chronotropism (increased heart rate)
a] negative chronotropism (decreased heart rate) ...
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- Spring '08