Hematologic depression is associated with radiation exposure due to dose to which body system?

Hematologic depression is associated with radiation exposure due to dose to which body system?

• A. Skin
• B. Brain
• C. Bone marrow
• D. Liver

Answer: (C)

Hematologic depression occurs when radiation hits the body’s blood-forming tissues. The bone marrow is the primary site for producing blood cells, housing the hematopoietic stem cells that generate white cells, red cells, and platelets. Because these cells divide rapidly, they are highly sensitive to radiation. When the bone marrow receives a radiation dose, its ability to produce blood cells drops, leading to cytopenias and overall hematologic depression. Other tissues like skin, brain, or liver aren’t the main sources of blood cell production in adults, so exposure to those areas doesn’t cause hematologic depression in the same direct way.

Hematologic depression occurs when radiation hits the body’s blood-forming tissues. The bone marrow is the primary site for producing blood cells, housing the hematopoietic stem cells that generate white cells, red cells, and platelets. Because these cells divide rapidly, they are highly sensitive to radiation. When the bone marrow receives a radiation dose, its ability to produce blood cells drops, leading to cytopenias and overall hematologic depression.

Other tissues like skin, brain, or liver aren’t the main sources of blood cell production in adults, so exposure to those areas doesn’t cause hematologic depression in the same direct way.