If the radiation you received from your X-ray does pose a health risk, how can this radiation cause the greatest harm?
A) Your DNA in cells that were radiated may be damaged by causing mutations.
B) Enough of your blood cells in the irradiated region may have been killed to make you sick.
C) Your nerves in the irradiated region may have been killed, causing you to lose sensation and control.
D) Most of the cells in the irradiated region were heated and killed by the X-ray energy.
Question 2
When you exercise, you can feel your body getting warmer, perhaps even starting to sweat. Why does exercise make you warmer?
A) Glucose oxidation speeds up during exercise to power muscular activities, and as a byproduct, extra heat is generated.
B) Your body is using anaerobic respiration, which releases more heat than oxidation.
C) More glucose is synthesized, requiring additional heat.
D) Your body is using fermentation to produce alcohol, which takes heat to break down.
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Chart showing average yearly dose of radiation from natural and human-made sources