Question 1

Why are children more susceptible to radiation than adults?

Accepted Answer

Young cells divide more rapidly than mature cells, and more rapidly dividing cells are more sensitive to the effects of radiation than older, more slowly dividing cells.

Question 2

The structures of the oral and facial regions are relatively radioresistant.

Accepted Answer

A) True 
 B)False  True

Question 3

All humans have the same sensitivity to radiation.

Accepted Answer

A) True 
 B)False  False

Question 4

Radioresistant refers to those tissues that are protected by the lead apron and thyroid collar during a dental x-ray exposure.

Accepted Answer

A) True 
 B)False

Question 5

Which of these is NOT a symptom of acute radiation syndrome.

Accepted Answer

A)  Constipation 
B)  Nausea 
C)  Hemorrhage 
D)  Hair loss 
A)  Constipation 
B)  Nausea 
C)  Hemorrhage 
D)  Hair loss

Question 6

The ALARA concept means "As Low As Reasonably Achievable."

Accepted Answer

A) True 
 B)False

Question 7

X-rays have been shown to have carcinogenic effects.

Accepted Answer

A) True 
 B)False

Question 8

Can dental x-rays cause cataracts in the lens of the eye?

Accepted Answer

No, it has never been reported that dent

Question 9

The latent period refers to the time between exposure to radiation and the ionization of molecules.

Accepted Answer

A) True 
 B)False

Question 10

When the severity of change is dependent on the radiation dose, the effect is called a/an:

Accepted Answer

A)  stochastic effect. 
B)  deterministic effect. 
C)  acute radiation effect. 
D)  lethal dose effect. 
A)  stochastic effect. 
B)  deterministic effect. 
C)  acute radiation effect. 
D)  lethal dose effect.

Question 11

Tissues have the capacity to repair radiation damage to a certain degree. However, some damage cannot be repaired and remains weakened, especially with repeated exposures. This is called:

Accepted Answer

A)  a long-term effect. 
B)  radioresistant tissue. 
C)  a cumulative effect. 
D)  a stochastic effect. 
A)  a long-term effect. 
B)  radioresistant tissue. 
C)  a cumulative effect. 
D)  a stochastic effect.

Question 12

Continued exposure to radiation over prolonged periods may result in each of the following EXCEPT one. Which one is the EXCEPTION?

Accepted Answer

A)  It may alter the ability of genetic cells to reproduce normally. 
B)  It may affect the ability of genetic cells to repair damage. 
C)  It may produce offspring with increased resistance to radiation exposure. 
D)  It may result in cumulative chromosome damage. 
A)  It may alter the ability of genetic cells to reproduce normally. 
B)  It may affect the ability of genetic cells to repair damage. 
C)  It may produce offspring with increased resistance to radiation exposure. 
D)  It may result in cumulative chromosome damage.

Question 13

Which of the following statements about radiation repair is FALSE?

Accepted Answer

A)  Somatic cells cannot repair radiation damage. 
B)  Scientists believe that some radiation effects are cumulative. 
C)  Ions have a strong tendency to recombine immediately to form water again. 
D)  The quantity, duration, and body area irradiated determine the amount of damage inflicted by the radiation. 
A)  Somatic cells cannot repair radiation damage. 
B)  Scientists believe that some radiation effects are cumulative. 
C)  Ions have a strong tendency to recombine immediately to form water again. 
D)  The quantity, duration, and body area irradiated determine the amount of damage inflicted by the radiation.

Question 14

When do the effects of irradiation occur?

Accepted Answer

Following

Question 15

A less specialized cell is more radioresistant.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following statements regarding the theory established by a threshold dose-response curve is true?

Accepted Answer

A)  There is a dose below which no biological response would be expected. 
B)  It predicts the effects of very low levels of radiation exposure. 
C)  It indicates that any amount of radiation has the potential to cause a biological response. 
D)  It has been adopted by the radiation protection community as the conservative approach to radiation exposure. 
A)  There is a dose below which no biological response would be expected. 
B)  It predicts the effects of very low levels of radiation exposure. 
C)  It indicates that any amount of radiation has the potential to cause a biological response. 
D)  It has been adopted by the radiation protection community as the conservative approach to radiation exposure.

Question 17

In addition to x-radiation, list other causes of changes to the genetic material of cells.

Accepted Answer

Drugs, chemicals, elevated bod

Question 18

Cancer is a stochastic effect of exposure to radiation.

Accepted Answer

A) True 
 B)False

Question 19

The average effective dose equivalent from naturally occuring background radiation to the population of the United States is approximately 8 µSv (microsieverts) per day.

Accepted Answer

A) True 
 B)False

Question 20

Which of the following statements regarding radiation injury is FALSE?

Accepted Answer

A)  The smaller the area of tissue exposure, the greater damage to the individual. 
B)  The greater the dose, the more severe the probable biological event. 
C)  The rate at which the radiation is absorbed may determine which biological effects occur. 
D)  A given dose may produce fewer biologic effects if the cells have a chance to recover. 
A)  The smaller the area of tissue exposure, the greater damage to the individual. 
B)  The greater the dose, the more severe the probable biological event. 
C)  The rate at which the radiation is absorbed may determine which biological effects occur. 
D)  A given dose may produce fewer biologic effects if the cells have a chance to recover.

Exam 5: Effects of Radiation Exposure

Why are children more susceptible to radiation than adults?

The structures of the oral and facial regions are relatively radioresistant.

All humans have the same sensitivity to radiation.

Radioresistant refers to those tissues that are protected by the lead apron and thyroid collar during a dental x-ray exposure.

Which of these is NOT a symptom of acute radiation syndrome.

The ALARA concept means "As Low As Reasonably Achievable."

X-rays have been shown to have carcinogenic effects.

Can dental x-rays cause cataracts in the lens of the eye?

The latent period refers to the time between exposure to radiation and the ionization of molecules.

When the severity of change is dependent on the radiation dose, the effect is called a/an:

Tissues have the capacity to repair radiation damage to a certain degree. However, some damage cannot be repaired and remains weakened, especially with repeated exposures. This is called:

Continued exposure to radiation over prolonged periods may result in each of the following EXCEPT one. Which one is the EXCEPTION?

Which of the following statements about radiation repair is FALSE?

When do the effects of irradiation occur?

A less specialized cell is more radioresistant.

Which of the following statements regarding the theory established by a threshold dose-response curve is true?

In addition to x-radiation, list other causes of changes to the genetic material of cells.

Cancer is a stochastic effect of exposure to radiation.

The average effective dose equivalent from naturally occuring background radiation to the population of the United States is approximately 8 µSv (microsieverts) per day.

Which of the following statements regarding radiation injury is FALSE?

Dental Radiography: Historical Perspective and Future Trends

Characteristics and Measurement of Radiation

The Dental X-Ray Machine: Components and Function

Factors Affecting Radiographic Quality

Radiation Protection

Dental X-Ray Film and Processing Methods

Digital Radiography and Image Acquisition

Infection Control

Legal and Ethical Responsibilities

Patient Relations and Education

Introduction to Radiographic Examinations

The Periapical Examinationparalleling Technique

The Periapical Examinationbisecting Technique

The Bitewing Examination

The Occlusal Examination

The Panoramic Examination

Identifying and Correcting Undiagnostic Radiographs

Quality Control and Environmental Safety in Dental Radiography

Image Orientation and Introduction to Interpretation

Recognizing Normal Radiographic Anatomy Intraoral Radiographs

Recognizing Normal Radiographic Anatomy Panoramic Radiographs

Radiographic Appearance of Dental Materials and Foreign Objects

The Use of Radiographs in the Detection of Dental Caries

The Use of Radiographs in the Evaluation of Periodontal Diseases

Describing Radiographic Anomalies, Lesions, and Opportunistic Screening

Pediatric Radiographic Techniques

Radiographic Techniques for Patients With Special Needs

Radiographic Techniques for Specific Oral Conditions

Radiographic Techniques

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