Given a scientific question, generate a correct answer to it.

Input: Consider Input: Shielding should be used when receiving x-rays to limit exposure to what potentially harmful form of energy?

Output: radiation

Input: Consider Input: What cells do lymphocytes originate from in the bone marrow?

Output: stem cells

Input: Consider Input: What reinforces the thin walls of the right ventricle and plays a crucial role in cardiac conduction?
Output: moderator band