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To produce a radiation response in humans within a few days to months, this is called ....
early effect of radiation exposure
The sequence of events that follow high-level radiation exposure leading to death within days or weeks is called the
acute radiation syndrome.
What are the 3 The sequence of events that follow high-level radiation exposure leading to death within days or weeks
- hematologic death,
- gastrointestinal (GI) death, and
- central nervous system (CNS) death.
CNS death requires radiation doses in excess of ____ Gyt (____ rad) and results in death within hours
What Syndrome results in death within hours
consists of acute clinical symptoms that occur within hours of exposure and continue for up to a day or two is called
The prodromal period
After the prodromal period has ended, there may be____ period, during which the subject is free of visible effects.
what is the Atomic site and threshold for Hematologic
- Atomic Site= Whole body
- Threshold= 250 mGyt (25 rad)
what is the Atomic site and threshold for Skin erythema
- Atomic Site= Small field
- Threshold= 2 Gyt (200 rad)
what is the Atomic site and threshold for Epilation
- Threshold= 3 Gyt (300 rad)
- Atomic site= small field
death is due to bone
marrow destruction is called
3- Central Nervous
death is due to destruction of villa (intestinal cells) / uncontrolled passage of fluids across intestinal membrane and unable to absorb nutrients is called
2- Central Nevous
death is due to massive intra-cranial pressure is called
2- Central nervous
2- Central nervous -
At radiation doses above approximately ___ Gyt (___ rad) delivered to the total body, signs and symptoms of radiation sickness may appear within minutes to hours.
The symptoms of early radiation sickness most often take the form of ____, ______, ____, and a reduction in the white blood cells of the peripheral blood (leukopenia)
The LD50/60 is the dose of radiation to the whole body that causes ___% of irradiated subjects to die within ___ days.
As the whole-body radiation dose increases, the average time between exposure and death decreases. This time is known as the _______
mean survival time
_________ IS THE TIME BETWEEN radiation exposure and death
Mean survival time
skin damage seen as (a sunburn-like reddening of the skin)
(ulceration and denudation of the skin), which often required interruption of treatment.
follows a _______, threshold dose response relationship
sterility may result for as long as _____months when the testes receive a
radiation dose of 2 Gy (200 rad).
______ will most likely result from a radiation dose of 5 or 6 Gy (500 or
600 rad) to the testes.
single radiation exposure of 2 Gy (200 rad) to the ovaries usually results in
temporary sterility of the female, whereas a dose of 5 to 6 Gy (500 to 600 rad)
will result in permanent sterility.”
true or false
_____ and the spermatogonia are the most radiosensitive cells in the body
are less sensitive than the other blood cells, apparently because of their very
long lifetime in the peripheral blood.
chromosome aberrations follow a_____ dose-response relationship