Radiation Effects Quiz

What is the latent period in radiation injury?

• The period of injury after exposure to radiation

• The recovery period after radiation exposure

• The time between exposure to radiation and the appearance of observable clinical signs

• The last event in the sequence of radiation injury

What is the main type of damage caused by somatic radiation?

• Loss of hair

• Formation of giant cells

• Abnormal mitotic activity

• Genetic damage

What does LET measure in radiation?

• The duration of radiation exposure

• The type of radiation

• Energy released in a given distance

• The biological effectiveness of radiation

Which type of radiation has a high LET?

• Neutrons

• Protons

• X-rays

• Gamma rays

What does RBE measure in radiation?

• The type of radiation

• The energy released in a given distance

• The biological effectiveness of one type of ionizing radiation relative to another

• The duration of radiation exposure

What is the main effect of direct interaction of ionizing radiation with DNA?

• Production of free radicals

• Strand breaks in DNA

• Combining with other molecules in solution

• Formation of hydrogen peroxide

What is the most probable phenomena due to the composition of human body being 70% water?

• Formation of hydrogen peroxide

• Production of free radicals

• Combining with other molecules in solution

• Formation of gaseous hydrogen

What is the result of energy absorption by water in the body?

• Formation of hydrogen peroxide

• Production of free radicals

• Combining with other molecules in solution

• Formation of gaseous hydrogen

What is the main effect of indirect interaction of ionizing radiation with other molecules or atoms rather than DNA?

• Formation of hydrogen peroxide

• Production of free radicals

• Combining with other molecules in solution

• Strand breaks in DNA

How does radiation produce biological effects?

• By directly dissociating molecules following their excitation and ionization

• By indirectly producing free radicals and hydrogen peroxide in the water of the body fluids

• None of the above

• Both A and B