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Radiation Safety & CEDO Prep > Biological Effects of Ionizing Radiation & Maximum Permissible Dose > Flashcards

Biological Effects of Ionizing Radiation & Maximum Permissible Dose Flashcards

1
Q

What are the immediate effects of ionizing radiation
received as a Whole Body Dose when the amount is:

0 - 250 mSv

A
  • No obvious injury.
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2
Q

What are the immediate effects of ionizing radiation
received as a Whole Body Dose when the amount is:

250 - 500 mSv

A
  • Temporary blood changes possible
  • No serious injury
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3
Q

What are the immediate effects of ionizing radiation
received as a Whole Body Dose when the amount is:

500 - 1000 mSv (1 Sv)

A
  • blood and cell changes
  • some injury
  • no disability
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4
Q

What are the immediate effects of ionizing radiation
received as a Whole Body Dose when the amount is:

1 - 2 Sv

A
  • Injury
  • Disability possible
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5
Q

What are the immediate effects of ionizing radiation
received as a Whole Body Dose when the amount is:

2 - 4 Sv

A
  • Injury certain
  • Disability certain
  • Death possible
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6
Q

What are the immediate effects of ionizing radiation
received as a Whole Body Dose when the amount is:

5 Sv

A
  • Fatal to 50% of people within 30 days
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7
Q

What are the immediate effects of ionizing radiation
received as a Whole Body Dose when the amount is:

10 Sv

A
  • Fatal to all people
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8
Q

What is a Somatic Effect?

A

Radiation injury to the person but not to their reproductive cells.

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9
Q

What is an Accute Effect?

A

Radiation injury appearing within minutes, days or weeks.

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10
Q

What is a Chronic Effect?

A

Long-term radiation injury appearing years or generations later.

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11
Q

What is a Genetic Effect?

A

Radiation exposure/injury resulting in chromosome damage.

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12
Q

Give examples of radioresponsive tissue.

A
  1. Blood forming organs (bone marrow, spleen…)
  2. Sex organs (gonads)
  3. Liver
  4. Eye lenses
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13
Q

What is meant by the “Latent Period”?

A

The period of time needed after radiation exposure before the effects become visible or demonstrable.

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14
Q

Give five examples of radioresistive tissues.

A
  1. Tendons, Ligaments
  2. Brain
  3. Bone
  4. Fat
  5. Muscle
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15
Q

What factors influence the extent of biological damage?

A
  • absorbed radiation amount
  • absorbtion rate
  • type of radiation
  • area exposed
  • individual variability
  • relative sensitivity of cells and tissue
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16
Q

What types of effects can radiation have on a person?

A
  • burns to superficial tissues
  • general effects to blood & blood-forming organs
  • induction of malignant tumors
  • impaired fertility
  • cataracts
  • early effects of acute whole-body exposure

Radiation Safety & CEDO Prep (7 decks)

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