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4 3. During the first step of the clotting process, an arteriole will platelets bind to collagen fibers using during the seco
8. Which of these lists the components of the conduction system in the heart in the correct order, from slowest to fastest? S
11. Which of these would NOT cause a decrease in cardiac output? Select one: a. Decreased ESV b. Decreased heart rate c. Incr
14. End diastolic volume would be present in the ventricles at point __;end systolic volume would be present at Select one: O
16. During ejection, the elastic arteries and the semilunar valves are Select one: a. stretch; open o b. stretch; closed x C.
science   Anatomy-And-Physiology   
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Answer #1

Answer:

3. b) Vasoconstrict; von willibrand factor

8. d) AV node, purkinje fiber Sa node

Explanation: Conduction is fastest in SA node and slowest in AV node

11. Decreased ESV

Explanation: CO = HR x SV = HR x ( EDV - ESV)

Decreased ESV ( End systolic volume) is due to increased contractility resulting in increase stroke volume.

14. c) 2; 6

explanation: Disatole ends when atrial contraction pumps the remaining blood from atria into the ventricle. Atrial contraction in ecg is indicated by p wave which is labeled as 2.

16. a) stretch, open

Explanation: ejection involves the exit of blood from ventricles through opening of semilunar valves

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