Final answer:
White blood cells, including granulocytes, are the most radio sensitive among the options provided because they have a high mitotic rate, making them more vulnerable to radiation effects compared to cells that divide less frequently.
Step-by-step explanation:
The most radio sensitive cells in the human body are those that are rapidly proliferating, such as bone marrow cells, intestinal lining cells, skin cells, and reproductive cells. Of the options provided, white blood cells (including granulocytes, which are a type of white blood cell) are particularly sensitive to radiation. This is because these cells are often rapidly dividing to replace those that have been spent fighting off pathogens. Because of their high mitotic rate, they are more susceptible to the damaging effects of radiation compared to cells that divide less frequently, such as brain cells.
Among the options given:
- Epithelial cells
- Granulocytes
- Brain cells
- White blood cells
the
granulocytes
and other
white blood cells
are the most radio sensitive.