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Rad biology
Rad biology
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Basics of radiation biology
Flashcards
15 cards
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Practice quiz
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Host live
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Questions
15
Answers
1
What type of radiation has a higher LET?
Alpha particles
Diagnostic x-rays
2
As LET increases, RBE
Increases
Stays the same
Decreases
Not enough information
3
Biological factors affecting radiosensitivity include
LET
A & B
Age of organism
Type of tissue
4
Complex organisms show a minimum threshold dose before their cells begin to die.
False
True
5
Which target model is not observable?
Single-hit, multi-target
Single-hit, single-target
None of these
Multi-hit, single target
6
Physical factors affecting radiosensitivity include
Dose rate
A & B
Gender
LET
7
What type of radiation has an RBE of 1?
5 MeV Alpha Particles
Diagnostic X-Rays
10 MeV Protons
Heavy recoil nuclei
8
Biological material is
most
sensitive to rad exposure under which of the following condition?
Oxygenated
Hypoxic
No difference
Anoxic
9
Any uncharged atom with a single, unpaired electron in the outermost shell
hydrogen
Ion
Free radical
Isomer
10
Biological material is
least
sensitive to irradiation under which conditions?
Hypoxic
No difference
Oxygenated
Anoxic
11
Which dose response curve requires a specific dose before effects of radiation are observable?
Non-linear non-threshold
Linear
Non-linear threshold
Linear non-threshold
12
Mutations follow which type of curve?
Linear, threshold
Linear, non-threshold
Nonlinear, non-threshold
Nonlinear, threshold
13
A patient receives a 100 -rad treatment over a short period of time. The results would be
Greater than receiving the dose over a longer period of time
Time has no affect on dose
Less than receiving the dose over a long period of time
The dose would be equal
14
Which type of mutation usually results in cell death?
Frameshift mutation
Point Mutation
15
Direct hit requires that a photon or particle of radiation directly ionizes a:
Cell membrane
Water molecule
Key gene on a chromosome
Mitochondria
