Excessive exposure to ionizing radiation can lead to erythema of which body part?

• A. Skin
• B. Eyes
• C. Gonads
• D. Lungs

Answer: (A)

Excessive exposure to ionizing radiation can lead to erythema of the skin. This is because the skin is the most external organ and is directly in contact with the radiation source. Ionizing radiation has enough energy to cause damage to the skin cells, resulting in inflammation and redness, which is clinically referred to as erythema.

The skin contains various cells that are sensitive to radiation, and when exposed to high doses, it can lead to burn-like symptoms characterized by redness, swelling, and even blistering in severe cases. Therefore, the skin's response to excessive radiation is a well-documented effect, making it the correct answer in the context of this question.

Other body parts listed, such as the eyes, gonads, and lungs, can also be adversely affected by radiation exposure, but they do not typically exhibit erythema as a primary response. The eyes may suffer from cataracts with prolonged exposure, gonads may experience sterility or genetic damage, and the lungs are at risk for various forms of pulmonary injury. However, these conditions do not present as erythema, which is specific to the skin.