13. How does regular exercise improve cardiovascular function during times of stress? A. It reduces the amount of endorphins released in the body. B. It reduces carbon dioxide supplies and raises triglyceride levels. C. It increases oxygen supplies and lowers triglyceride levels. D. It increases the level of hormones circulating in the body.
The answer is C. This is so because when someone exercises, their body improves. The strengthen arteries, and open up the lungs, and veins... which in tern, can help the transportation of oxygen levels.
