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RAD201

Exam 2 review

QuestionAnswer
Which of the following is/are considered low-LET radiation(s)? x-rays and gamma rays
Which of the following groups of cells is most radiosensitive? lymphocytes
Which tissues contain cells that do not divide? muscle tissue and nervous tissue in adults
The radiation dose required to produce mitotic death is? less than the dose needed to produce apoptosis in slowly dividing cells or nondividing cells.
If bone marrow cells have not been destroyed by exposure to ionizing radiation, they can? repopulate after a period of recovery
A biologic reaction is produced by 4 Gyt of a test radiation. It takes 16 Gyt of 250-kVp x-rays to produce the same biologic reaction. What is the relative biologic effectiveness (RBE) of the test radiation? 4
OH* + OH* = __________. h2o2
Which human is most radiosensitive? An embryo-fetus during the first trimester of pregnancy
Neutrophils play an essential role in fighting infection
Which is a category of white blood cell that is essential in fighting infections? granulocytes
Based on current data, which of the following would be considered a safe radiation dose for the gonads of both males and females? 0 Gyt
The term apoptosis is synonymous with programmed cell death
Which group of cells is least radiosensitive? adult nerve cells
The prodromal stage of acute radiation syndrome is actually the beginning stage
Chromosomal damage can be caused by both low and high radiation dose
A term that is synonymous with loss of hair is epilation
What is classified as early tissue reactions of ionizing radiation? Nausea, epilation, and intestinal disorders
The correct order of development of the male germ cell from the stem cell phase to the mature cell is spermatogonia, spermatocyte, spermatid, sperm
What is not a form of acute radiation syndrome? carcinogenic syndrome
The term LD 50/30 signifies the whole-body dose of radiation that can be lethal to 50% of the exposed population within 30 days.
Radium decays with a half-life of 1622 years
Some mutations in genetic material occur spontaneously, without a known cause. In humans, a hereditary disorder is present in approximately _________ of all live births in the United States. 10%
The human body can incorporate radium into bone because it is chemically similar to calcium
Laboratory experiments with mice conclude that cataracts may be caused by doses of ionizing radiation as low as 0.1 Gyt
Which of the following late effects caused by exposure to ionizing radiation is considered to be most significant? cancer
Radiation-induced cataracts in humans follow a ______ dose–response relationship. threshold, nonlinear
Mutations in genes and DNA that occur at random as natural phenomena are called spontaneous mutations
Genetic mutations at the molecular level are called point mutations
The effective dose (EfD) occupational limit for the lens of the eye is 15 mSv
Determine the cumulative effective dose (CumEfD) limit to the whole body of an occupationally exposed person who is 46 years old. 460 mSv
The primary function of the Nuclear Regulatory Commission (NRC) is to oversee the nuclear energy industry
Which of the following terms involves a random effect of ionizing radiation? stochastic event
Which of the following agencies was previously known as the Atomic Energy Commission? NRC
Which of the following groups is run by the government of Japan, primarily to study Japanese atomic bomb survivors? Radiation Effects Research Foundation
The ALARA concept adopts an extremely conservative model concerning the relationship between ionizing radiation and potential risk
Created by: travis686
 

 



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