Can someone answer these three biology questions?

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New member
1. After leaving the right ventricle, blood passes through
a. aorta
b. vena cava
c. pulmonary artery
d. pulmonary vein

2. Exercise causes which of the following?
a. increase in preload
b. increase in afterload
c. increase in contractility
d. none of these

3. Explain why Usain Bolt's Cardiac output is very high during his 200M race?
a. High heart rate and stroke volume
b. Low heart rate and Stroke volume
c. Low Heart rate and high stroke volume
d. High heart rate and low stroke volume
 
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