Which best explains what happened?

It’s very cold outside and Bill gets into the spa, turning it up to its maximum temperature (106DegF). After several minutes in the water, he faints and would have drowned if a passerby had not saved him.

Which best explains what happened?
A . His body could not tolerate the shock going from cold to hot.
B. He suffered a heart attack due to the excess heat.
C. He fainted from a lack of oxygenated blood to his brain.
D. He received second-degree burns and went into shock.

View Answer

Answer: C

Explanation:

When the body is exposed to prolonged heat, more blood is shunted to superficial veins in order to lower body temperature. This results in decreased venous return to the heart. The resulting lowered cardiac output causes less oxygenated blood to reach the brain, causing dizziness and fainting.