Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Radiation Protection
Biological Aspects of Radiation
| Question | Answer |
|---|---|
| Biological Effects of Radiation | Random may or may not result in biological changes. |
| True or False There is no way to predict which cells will be affected by irradiation? | True |
| Negative effects of radiation detectable only after time and in the form of a different disease is called? | Latent Period |
| What is Radiation? | Form of energy part of electromagnetic spectrum made up of units of energy called photons |
| True or False Photons have no mass or weight | True |
| Photons travel in... | Wave motion differentiated by wavelength |
| Electromagnetic Radiations with long wave lengths are | Low-energy radiations can travel great distances but little penetrating power. |
| Ionizing Radiation | Shorter wavelength, higher penetrating power |
| True or False Ionizing radiation cannot displace electrons in an atoms orbit leaving atom charged and ionized. | False |
| Linear dose-response relationships | Dose and response are directly proportional to each other. |
| For Threshold-Dependent linear relationship | radiation must reach minimal amount before negative affects |
| For Linear non threshold dose-response | no response to dose until certain level reached. |
| Linear non threshold curve describes | describes relationships b/w radiation dose & the occurrence &induced cancers & genetics effects. |
| Linear non threshold curve effects considered | random or stochastic and no predictable dose for occurrence. |
| Non Threshold causes | Negative Effects |
| Linear non threshold curve used in prescribing | Radiation Protection |
| non linear dose response | dose and response are not directly proportional |
| non linear curve is the non linear S curve also called | Sigmoid Curve |
| non linear or sigmoid curve need | great amount of radiation before effect is seen and small amounts there after. |
| Non-Stochastic or predictable | non linear threshold curve or sigmoid curve |
| Dose-response relationships describe | amount of radiation applied and biological effect and described as linear or non linear |
| Linear relationship means | Biological effect is directly proportional. |
| Term Threshold is applied to | Linear and non linear relationships to define the dose below which no negative effects of radiation are detected. |
| Lethal dose of radiation that will result in death of 50% of the population within 30 days of exposure is called | LD 50/30 |
| Lethal Dose for humans | 250-450 rad |
| 3 major categories of radiation sickness | Hematopoietic syndrome, gastrointestinal syndrome, and central nervous system syndrome |
| Hematopoietic Syndrome occurs at | lowest dose ( 100-1000) rad |
| most sensitive to radiation exposure | Hematopoietic ( causes decrease in red blood cells clotting cells resulting in decrease in immune response and blood clotting ability |
| individual may die with 30 days | from secondary disease or Hemorrhage |
| Gastrointestinal syndrome occurs | at 600-1000 rad causes abnormal function of GI |
| experience nausea, vomiting, ulcerations, and hemorrhage and may die within 10-14 days | Gastrointestinal syndrome |
| confusion,disorientation,ataxia and increase in intracranial pressure and seizures,agitation,and shock | Central Nervous System syndrome ( death usually within 14-36 hrs) |
Created by:
100000250877027
Popular Radiology sets