25 notecards = 7 pages (4 cards per page)
The term “apoptosis” is synonymous with:
programmed cell death
Which of the following gonadal radiation doses may cause permanent sterility in a human male?
Direct action may occur after exposure to any type of radiation, but it is much more likely to happen after exposure to:
high-LET radiation such as alpha particles
If bone marrow cells have not been destroyed by exposure to ionizing radiation, they can:
repopulate after a period of recovery
Neutrophils play an important role in:
Which of the following means the loss or change of a nitrogenous base in the DNA chain?
Which of the following illustrates the radiation sensitivity of a particular type of cell?
While passing through a human cell, an x-ray photon interacts with and inactivates the cell’s master molecule. What is the consequence for the cell?
_____ of the effects of x-radiation and gamma in macromolecules of living systems (in vivo) occur as a result of indirect action.
As LET increases, the ability of ionizing radiation to cause biologic effects:
also generally increases until it reaches a maximal value
Which of the following statements is true concerning patients who receive radiation exposure from a routine radiographic procedure such as a chest x-ray?
Patients are not expected to sustain appreciable damage to either the blood or the blood-forming organs as a consequence of the examination.
Which of the following is a scavenger-type of white blood cell that fights bacteria?
The radiation dose required to produce mitotic death is:
less than the dose needed to produce apoptosis in slowly dividing cells or nondividing cells
Which of the following groups of cells is most radiosensitive?
Which of the following groups of cells is least radiosensitive?
Adult nerve cells
A periodic blood count is not recommended as a method for monitoring occupational radiation exposure because:
2 and 3 only
Based on current data, which of the following would be considered a safe radiation dose for the gonads of both males and females?
A biologic reaction is produced by 4 Gy (400 rad) of a test radiation. It takes 16 Gy (1600 rad) of 250-kVp x-rays to produce the same biologic reaction. What is the relative biologic effectiveness (RBE) of the test radiation?
Radiosensitivity of ova:
varies considerably throughout the lifetime of the germ cell
One micron (mm) = _____ m.
Which of the following humans is most radiosensitive?
The embryo-fetus during the first trimester of pregnancy
Which of the following is (are) considered low-LET radiation(s)?
1 and 3 only
The normal white blood cell count for an adult ranges from _____ to _____/mm3 of blood.
Which of the following tissues contain cells that do not divide?
2 and 3 only
OH* + OH* = __________.