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Most early somatic tissue reactions have this—a point at which symptoms begin to appear and below which they are absent
What is a threshold?
This term refers to the shrinkage of organs and tissues caused by significant cell death following high radiation exposure
What is atrophy?
These specialized proteins allow cells to repair and recover from sub-lethal doses of ionizing radiation
What are repair enzymes?
This process involves using an analysis of tissue damage to estimate the radiation dose a person received
What is dosimetry?
This therapeutic concept aims to deliver a lethal dose to a tumor while sparing the surrounding healthy tissue
What is the therapeutic ratio?
This vital organ system, responsible for manufacturing blood elements, is the most radiosensitive in humans
What is the hematopoietic system?
This term describes a diffuse redness over an area of skin that can occur after high radiation doses
What is erythema?
Research indicates that while 90% of radiation damage may be repaired, this percentage is considered irreparable
What is 10%?
Data regarding ARS has been obtained from epidemiologic studies of survivors from these two Japanese cities
What are Hiroshima and Nagasaki?
This is a chromosome map consisting of a photograph of the human cell nucleus used to analyze radiation-induced damage
What is a karyotype?
This specific organ is the most severely affected part of the gastrointestinal tract during GI syndrome
What is the small intestine?
This symptom, also known as hair loss, is a possible consequence of high radiation exposure
What is epilation?
In the 1920s and 30s, blood counts were used for monitoring because this dose was required to produce a measurable hematologic depression
What is 0.25 Gyt?
Victims of this 1986 nuclear power plant accident provided significant data on the development of ARS in humans
What is the Chernobyl disaster?
Radiation-induced chromosome damage is most easily evaluated during this specific phase of cell division
What is metaphase?
This form of ARS appears at a threshold dose of approximately 6 Gyt and results in death primarily due to damage to epithelial cells
What is the gastrointestinal (GI) syndrome?
This condition refers to the shedding of the outer layer of skin after irradiation
What is desquamation?
Historically, skin diseases like ringworm were treated using these very low-energy x-rays in the range of 10 to 20 kVp
What are grenz rays?
This Boston dentist became the first advocate for radiation protection after suffering severe burns from his experiments
Who is William Herbert Rollins?
In both males and females, a gonadal dose as low as this can depress sperm population or delay menstruation
What is 0.1 Gyt?
This is the beginning stage of ARS where symptoms like severe nausea, vomiting, and diarrhea first appear
Question: What is the prodromal stage?
This symptom of cerebrovascular syndrome involves a lack of muscular coordination and confusion
What is ataxia?
All cells of the hematopoietic system, including lymphocytes and erythrocytes, originate from this single type of precursor cell
What is the pluripotential stem cell?
Survivors of the Marshall Islands were inadvertently subjected to high levels of this during an atomic bomb test in 1954
What is fallout?
Regardless of medical treatment, whole-body equivalent doses greater than this amount are considered universally fatal
What is 12 Gyt?