Question 1

Which of the following types of radioactive particle has the highest LET?

Accepted Answer

A)  Alpha particle 
B)  x-ray 
C)  gamma-ray 
D)  proton 
A)  Alpha particle 
B)  x-ray 
C)  gamma-ray 
D)  proton A

Question 2

Irradiation hits occur through _____.

Accepted Answer

A)  indirect effects 
B)  direct effects 
C)  excitation events 
D)  both A and B 
A)  indirect effects 
B)  direct effects 
C)  excitation events 
D)  both A and B D

Question 3

The lethal effects of cell irradiation are measured by cell _____.

Accepted Answer

A)  death 
B)  survival 
C)  damage 
D)  mutation 
A)  death 
B)  survival 
C)  damage 
D)  mutation B

Question 4

If oxygen is present during low-LET radiation the effect of radiation is?

Accepted Answer

A)  reduced 
B)  minimal 
C)  maximal 
D)  the same 
A)  reduced 
B)  minimal 
C)  maximal 
D)  the same

Question 5

According to target theory,the target molecule of a cell is _____.

Accepted Answer

A)  any molecule in the cell 
B)  the DNA in the nucleus 
C)  a water molecule 
D)  a protein macromolecule 
A)  any molecule in the cell 
B)  the DNA in the nucleus 
C)  a water molecule 
D)  a protein macromolecule

Question 6

The probability of a hit is increased with _____ oxygen and _____ LET radiation.

Accepted Answer

A)  high, low 
B)  low, low 
C)  high, high 
D)  low, high 
A)  high, low 
B)  low, low 
C)  high, high 
D)  low, high

Question 7

The DQ is the _____ dose for irradiation of human cells.

Accepted Answer

A)  single-target 
B)  multi-hit 
C)  lethal 
D)  threshold 
A)  single-target 
B)  multi-hit 
C)  lethal 
D)  threshold

Question 8

The mean lethal dose for high LET radiation is ______ than after low LET radiation.

Accepted Answer

A)  higher 
B)  lower 
C)  the same 
D)  unknown 
A)  higher 
B)  lower 
C)  the same 
D)  unknown

Question 9

If oxygen is present during high-LET radiation the effect of radiation is?

Accepted Answer

A)  reduced 
B)  minimal 
C)  maximal 
D)  the same 
A)  reduced 
B)  minimal 
C)  maximal 
D)  the same

Question 10

A target molecule that is _____ will always cause cell death.

Accepted Answer

A)  inactivated 
B)  damaged 
C)  hit 
D)  ionized 
A)  inactivated 
B)  damaged 
C)  hit 
D)  ionized

Question 11

The x-intercept of a low LET cell-survival curve is _______ larger than a similar high LET cell-survival curve.

Accepted Answer

A)  the same 
B)  larger 
C)  smaller 
D)  none of the above 
A)  the same 
B)  larger 
C)  smaller 
D)  none of the above

Question 12

Human cells are most radiosensitive during the _____ phase of the cell cycle.

Accepted Answer

A)  gap2 
B)  gap1 
C)  mitosis 
D)  synthesis 
A)  gap2 
B)  gap1 
C)  mitosis 
D)  synthesis

Question 13

A hit to a cell target can occur from a(n)_____ effect.

Accepted Answer

A)  indirect 
B)  direct 
C)  oxygen 
D)  both A and B 
A)  indirect 
B)  direct 
C)  oxygen 
D)  both A and B

Question 14

The _____-target,_____-hit model of radiation induced cell death applies to simple cells only.

Accepted Answer

A)  single, single 
B)  multiple, multiple 
C)  multiple, single 
D)  single, multiple 
A)  single, single 
B)  multiple, multiple 
C)  multiple, single 
D)  single, multiple

Question 15

The DO represents the _____ dose for human cells.

Accepted Answer

A)  mean survival 
B)  mean lethal 
C)  50% survival 
D)  50% lethal 
A)  mean survival 
B)  mean lethal 
C)  50% survival 
D)  50% lethal

Exam 32: Cellular Radiobiology

Which of the following types of radioactive particle has the highest LET?

Irradiation hits occur through _____.

The lethal effects of cell irradiation are measured by cell _____.

If oxygen is present during low-LET radiation the effect of radiation is?

According to target theory,the target molecule of a cell is _____.

The probability of a hit is increased with _____ oxygen and _____ LET radiation.

The DQ is the _____ dose for irradiation of human cells.

The mean lethal dose for high LET radiation is ______ than after low LET radiation.

If oxygen is present during high-LET radiation the effect of radiation is?

A target molecule that is _____ will always cause cell death.

The x-intercept of a low LET cell-survival curve is _______ larger than a similar high LET cell-survival curve.

Human cells are most radiosensitive during the _____ phase of the cell cycle.

A hit to a cell target can occur from a(n)_____ effect.

The _____-target,_____-hit model of radiation induced cell death applies to simple cells only.

The DO represents the _____ dose for human cells.

Essential Concepts of Radiologic Science

The Structure of Matter

Electromagnetic Energy

Electricity, Magnetism, and Electromagnetism

The X-ray Imaging System

The X-ray Tube

X-ray Production

X-ray Emission

X-ray Interaction with Matter

Concepts of Radiographic Image Quality

Control of Scatter Radiation

Screen-Film Radiography

Screen-Film Radiographic Technique

Computers in Medical Imaging

Computed Radiography

Digital Radiography

Digital Radiographic Technique

Viewing the Digital Radiographic Image

Screen-Film Radiographic Artifacts

Screen-Film Radiographic Quality Control

Digital Radiographic Artifacts

Digital Radiographic Quality Control

Mammography

Mammography Quality Control

Fluoroscopy

Digital Fluoroscopy

Interventional Radiography

Computed Tomography

Human Biology

Fundamental Principles of Radiobiology

Molecular Radiobiology

Deterministic Effects of Radiation

Stochastic Effects of Radiation

Health Physics

Designing for Radiation Protection

Patient Radiation Dose Management

Occupational Radiation Dose Management

Filters

The probability of a hit is increased with _ oxygen and _ LET radiation.

The _-target,_-hit model of radiation induced cell death applies to simple cells only.