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1.
1 point
What is the effect of acetylcholine on the cells of the SA node?
2.
1 point
Which of the following occurs as a result of a loss of fluid and plasma proteins that build up in peripheral tissues?
3.
1 point
Which of the following will DECREASE the end-systolic volume?
4.
1 point
Which of these vessels sends blood into the right atrium?
5.
1 point
What channels in a cardiac cell membrane open to create the plateau in the action potential?
6.
1 point
Which type of vessel has the lowest velocity of blood flow?
7.
1 point
Which of these factors that affect peripheral resistance can be quickly altered to change systemic BP?
8.
1 point
What organ provides long-term, continual regulation of blood volume and blood pressure by secreting renin and being the target of ADH and aldosterone?
9.
1 point
If cells of the SA node are killed, what part of the heart has the autorhythmicity to establish a new (slower) heart rate?
10.
1 point
Retention of excess fluid can stimulate the heart to secrete natriuretic peptides. Which of these is likely to occur next?
11.
1 point
In what part of the brain are the cardioacceleratory and cardioinhibitory centers located?
12.
1 point
What force has the greatest influence on retaining blood volume in the capillaries?
13.
1 point
What artery is found in the coronary sulcus?
14.
1 point
Which of the following would be treated with balloon angioplasty?
15.
1 point
Which of these is associated with intercalated discs?
16.
1 point
What structures help prevent backflow through the AV valves?
17.
1 point
What term refers to a heart rate higher than 100 bpm?
18.
1 point
In premature atrial contractions, what wave on the ECG occurs too often?
19.
1 point
Question: What nerves supply parasympathetic innervation to the SA and AV nodes?
20.
1 point
What part of the ventricular mass contracts first with each cardiac cycle?
21.
1 point
What term refers to contraction of the heart?
22.
1 point
What part of the conduction system supplies the ventricular myocardium?
23.
1 point
Which of these occurs first when systemic arterial blood pressure falls outside the normal range?
24.
1 point
In irreversible shock, which of the following causes damage to the heart, resulting in its failure?
25.
1 point
What valve lies between the right ventricle and its arterial outflow?
26.
1 point
An increase in venous return of blood to the heart will increase the EDV. Which of these will also occur?
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