BASIC RADIOBIOLOGY Flashcards

1
Q
  • a branch of science which combines the basic principles of physics and biology
  • is concerned with the action of ionizing radiation on biological tissues and living organisms
A

RADIOBIOLOGY

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2
Q

All living entities are made up of?

A

PROTOPLASM

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3
Q

basic microscopic unit of all living organisms

A

CELL

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4
Q

Group of cells that together perform one or more functions is referred to

A

TISSUE

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5
Q

Group of tissues that together perform one or more functions is
called

A

ORGAN

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6
Q

Group of organs:

A

ORGAN SYSTEM

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7
Q

either a sperm or an egg

A

GERM CELLS

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8
Q

all other human cells

A

SOMATIC CELLS

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9
Q
  • division of somatic cells
  • results in two genetically identical daughter cells
A

MITOSIS

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10
Q
  • division of germ cells
  • involves two fissions of the nucleus
    giving rise to four sex cells, each possessing half the number of chromosomes of the original germ cell
A

MEIOSIS

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11
Q

Somatic cells are classified as:

A

STEM CELLS
TRANSIT CELLS
MATURE CELLS

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12
Q

Dose is delivered continuously but at a lower dose rate

A

Protraction

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13
Q

Dose is delivered at the same dose rate, in equal fractions, separated by 24 hours

A

Fractionation

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14
Q

Tissue is more sensitive when…

A

Irradiated in the oxygenated state than when irradiated without oxygen

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15
Q

Aerobic

A

Oxygenated

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16
Q

Anoxic

A

Without oxygen

17
Q

Hypoxic

A

Low oxygen

18
Q

Cell dies before replicating

A

Interphase death

19
Q

Halogenated pyrimidines, methotrexate, acitinomycin D, hydroxurea, and vitamin K

A

Types of sensitizing agents

20
Q

Some studies show that a little bit of radiation is good for you

A

Hormesis

21
Q

_____ is a measure of the rate that energy is transferred from ionizing radiation to soft tissue

A

LET

22
Q

As LET _____ the RBE _______

A

Increases, increases

23
Q

Early effects/events
Normally occurs within days or minutes after the radiation exposure

A

DETERMINISTIC EFFECT

24
Q

Late effects/events
Normally occurs within months or years

A

STOCHASTIC EFFECT