Radiological Health Effects.

Cell damage from radiation ionizing the atoms making up the DNA is called a:

______ Effect

Direct

Cell damage from free radicals formed due to ionization of the water in a cell is called an:

______ Effect

Indirect

Check all the factors that make a cell more radiosensitive.

• Highly specialized cell

• Cells near the end of their reproductive life

• Long dividing future

• Rapid reproduction rate

• Unspecialized or low degree of differentiation

• Long dividing future

• Rapid reproduction rate

• Unspecialized or low degree of differentiation

What is the term used for delayed biological effects from radiation where there is not a threshold for the magnitude of the dose.

______ Effect

Stochastic

What is the term used for immediate biological effects from radiation that only occur above a threshold magnitude of dose.

______ Effect

Non-stochastic

Connect the effect to match the term.

• Somatic

• Genetic

• Teratogenic

• Occurs in the off-spring

• Occurs in the unborn fetus

• Occurs in the exposed individual

Somatic — Occurs in the exposed individual

Genetic — Occurs in the off-spring

Teratogenic — Occurs in the unborn fetus

Connect the dose range to match the radiation syndrome.

• Hematopoietic

• Gastrointestinal

• Central Nervous System

• > 5,000 rad

• 1,000 - 5,000 rad

• 200 - 1,000 rad

Hematopoietic — 200 - 1,000 rad

Gastrointestinal — 1,000 - 5,000 rad

Central Nervous System — > 5,000 rad

Place the cells in order from most to least radiosensitive.

• Blood Forming Cells

• Gastrointestinal Cells

• Nerve and Muscle Cells

• Blood Forming Cells

• Gastrointestinal Cells

• Nerve and Muscle Cells

Check all statements that are true about LD 50/30.

• Occurs with an exposure of 400-450 rad.

• 50% of the population will die within 30 days with medical treatment.

• 30% of the population will die within 50 days without medical treatment.

• 50% of the population will die within 30 days without medical treatment.

• Occurs with an exposure of 400-450 rad.

• 50% of the population will die within 30 days without medical treatment.

Check the sources of natural background radiation.

• Medical X-rays, CT scans

• Radon

• Cosmic rays

• Terrestrial sources (i.e. Radium, Thorium Uranium)

• Effluent releases from nuclear power plants

• Fall out from nuclear bomb testing

• Radon

• Cosmic rays

• Terrestrial sources (i.e. Radium, Thorium Uranium)

The acute radiation syndrome which occurs with a dose greater than 5,000 rads is called:

______ Syndrome

Central Nervous System