FREE RADIOLOGY AND STUDY GAMES ABOUT RT 244 CH

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FREE RADIOLOGY AND STUDY GAMES ABOUT RT 244 CH

31,32 EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -47 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: The initial ionizing event produces two ions, they are?

Answer:

HOH+ and e-

Question 2: LET stands for?

Answer:

Linear energy transfer Question 3: What are the three principle observable effects resulting from irradiation of DNA in vivo?

Answer:

cell death, malignant diseases, and genetic damage Question 4: What model applies to more complicated biologic systems such as human cells?

Answer:

Multitarget, Single hit

Question 5: What is the construction of large molecules from smaller molecules?

Answer:

Anabolism Question 6: Regarding the radiosensitivity of macromolecules, the most radiosensitive is?

Answer:

DNA

Question 7: RBE stands for?

Answer:

Relative biologic effect

Question 8: What 4 types of damage that occurs to DNA is reversible?

Answer:

one side rail severed, both side rails severed, cross-linking, and rung breakage

Question 9: In what phase is the cell least sensitive?

Answer:

S phase

Question 10: OER stands for?

Answer:

Oxygen enhancement ratio

Question 11: What are the 3 types of radiation-damage to human chromosomes?

Answer:

Terminal deletion, dicentric formation, and ring formation

Question 12: What is a liquid that contains dissolved substances?

Answer:

solution

Question 13: A cell's DNA has been irradiated. What are you most concerned about?

Answer:

genetic damage or mutation

Question 14: In what phase is the cell most sensitive?

Answer:

M phase

Question 15: 2 hydroperoxyl free radicals join to form what?

Answer:

H202 (hydrogen peroxide) Question 16: What is the irradiation of water that represents the principal interaction in the body?

Answer:

radiolysis Question 17: What model applies to biologic targets, such as enzymes, viruses, and simple cells such as bacteria?

Answer:

Single Target, Single Hit Question 18: Radiation effects occuring in vivo at the total body level occur mainly as a result of direct or indirect effect?

Answer:

Indirect Question 19: The principal radiation interaction within the human body is with what?

Answer:

water Question 20: When HOH- dissociates into small molecules, what does it seperate into?

Answer:

OH- and H*

Question 21: What are the free radicals produced during radiolysis of water?

Answer:

H* and OH*

Question 22: What is the thickness of a material?

Answer:

viscosity Question 23: The breakage of the thread or backbone is a long-chain macromolecule when irradiated in vitro is called?

Answer:

main-chain scission Question 24: This radiation effect on a macromolecule has a sticky substance on the end that attaches to neighbors or to another segment of the same molecule, what effect is this?

Answer:

cross-linking Question 25: What is a reactive atom or molecule having an unpaired electron in its outer shell?

Answer:

free radical Question 26: The difference in generation time among different types of cells is due mainly to the length of which phase?

Answer:

G1 phase

Question 27: What is radiation induced structural change in chromosomes?

Answer:

Cytogenetic damage Question 28: Regarding viscosity, after cross-linking occurs, describe the irradiated in vitro

solution:

Answer:

there is a increase in viscosity