Radiation Biology

Question 1

What type of cells are most susceptible to ionizing radiation?

Answer 1

Rabidly dividing tissues (e.g, bone marrow, intestinal lining, sex cells)

Question 2

What is the hierarchy of cell sensitivity?

Answer 2

Lymphocytes > Erythrocytes > Nerve cells

Question 3

The stochastic effects of radiation exposure are characterized by:

Answer 3

Stochastic effects of radiation are those that occur randomly with a probability proportional to the dose, meaning there’s no threshold dose below which they are certain not to occur. These effects, primarily cancer and heritable genetic effects, are characterized by a likelihood of occurrence that increases with the dose, but the severity of the effect itself is not directly related to the dose.

Question 4

The deterministic effects of radiation exposure are characterized by:

Answer 4

Deterministic radiation effects, also known as non-stochastic effects, are those that occur when radiation exposure exceeds a certain threshold dose, causing immediate and observable tissue damage. The severity of these effects directly increases with the radiation dose above the threshold. Examples include skin burns, cataracts, and hair loss