Which part of the cell cycle is most sensitive to radiation?
M-phase
Cells in late G2 and mitosis (M-phase) are the most sensitive to radiation, and cells in late synthesis (S-phase) are the most resistant (Fig. 23.10).
Why is S phase most radioresistant?
Low-LET radiation also delays progression through S phase which may allow more time for repair and hence contribute to radioresistance in late-S-phase.
What cell cycle is most radioresistant?
Cells in late S phase are usually most radioresistant and cells in M phase most radiosensitive.
Which cells are most radiosensitive?
Rapidly proliferating non-differentiated cells are the most radiosensitive. Well known representatives of this class of cells are the stem cells of the hematopoietic tissues and the cells of the intestinal crypts. The differentiated fixed postmitotic cells are the most radioresistant.
Which of the following cells are most sensitive to radiation exposure quizlet?
Which of the following types of blood cells is the most sensitive to radiation? Lymphocytes are white or colorless blood cells derived from lymphatic tissues. Because of their rapid cell division they are more susceptible to the affects of radiation.
What happens in M phase of cell cycle?
In the M phase, one parent cell physically divides into two daughter cells. This includes the physical separation of the duplicated genome (termed mitosis) and the subsequent separation of the cytoplasm by a process called cytokinesis.
What is most sensitive to radiation?
Lymphocytes (white blood cells) and cells which produce blood are constantly regenerating, and are, therefore, the most sensitive.
Why are rapidly dividing cells more sensitive to radiation?
The reason that rapidly growing cells are sensitive (in the sense that they are easily damaged or killed), is that during cell division, one double-stranded DNA becomes two single-stranded DNA chains.
Which of the following is the most sensitive to radiation quizlet?
Terms in this set (56) Which of the following types of blood cells is the most sensitive to radiation? Lymphocytes are white or colorless blood cells derived from lymphatic tissues. Because of their rapid cell division they are more susceptible to the affects of radiation.
Which is most radiosensitive quizlet?
DNA is the most radiosensitive molecule.
Which type of tissue is most sensitive to ionizing radiation?
The tissues most affected by radiation are those that undergo rapid replacement, such as bone marrow, the lining of the gastrointestinal tract, and skin. Slower-growing tissues, such as those of the brain and liver, require either high doses of radiation or prolonged exposure before they show symptoms of degeneration.
What happens in G2 phase of cell cycle?
During the second gap phase, or G 2​start subscript, 2, end subscript phase, the cell grows more, makes proteins and organelles, and begins to reorganize its contents in preparation for mitosis.