Final answer:
Acute radiation syndrome includes various forms based on the severity and areas affected, with symptoms ranging from changes in blood chemistry to mortality, particularly with dosages around 500 rems. The question appears incomplete, lacking specific options, but acute radiation syndrome may include hematopoietic, gastrointestinal, and cardiovascular/central nervous system effects from ionizing radiation like alpha, beta, and gamma rays.
Step-by-step explanation:
The forms of acute radiation syndrome can be categorized based on the severity and timing of radiation exposure. A short-term, sudden dose of a large amount of radiation can result in a range of health effects, with higher doses causing more severe symptoms and increasing the likelihood of fatality. The question provided seems to be missing the specific forms to choose from, but generally speaking, acute radiation syndrome often includes a hematopoietic syndrome (damage to bone marrow), gastrointestinal syndrome (damage to the stomach and intestines), and cardiovascular/central nervous system syndrome (damage to the heart, blood vessels, and brain), among other possible effects.
Immediate effects of radiation exposure include changes in blood chemistry and, depending on the dosage, potentially death. Typically, exposure to around 500 rems significantly increases the risk of mortality within 30 days. Three types of ionizing radiation—alpha rays, beta rays, and gamma rays—can contribute to these health effects, depending on their penetration power and exposure levels.