Introduction To Radiobiology

Question 1

Define radiobiology ?

Answer 1

 Radiobiology is a branch of science concerned with the methods
of interaction and the effects of ionizing radiation on living
systems.

Question 2

History of radiobiology

Answer 2

*In 1895 x-rays were discovered
* In 1896 radiation given by Uranium was discovered
*Discovery of radium by Pierre and Marie Curie in 1898
* In 1904 after the death of one of the radiation workers, medical researchers took seriously the fact that x-rays were fatal.
* Researchers began to work on the effects of radiation to
verify if the various condictions suffered by radiation
workers was due to x-rays
 The early observations of Roentgen, Becquerel, the
Curies, Edison, and early radiologists sparked research
about the effects of radiation exposure on biological
processes.
 From the early 1900s through the 1960s, many theories
were developed to define and explain these effects.

Question 3

harmful effects caused by the Ionizing radiation on
human body

Answer 3

• skin redness,
• body part
  *numbness,
  *dermatitis,
  *infection,
  *desquamation,
  *epilation,
• pain

Question 4

State the law of Bergonie and Tribondeau

Answer 4

1. Stem or immature cells are more radiosensitive than
   mature cells.
2. Younger tissues and organs are more radiosensitive than
   older tissues and organs.
3. The higher the metabolic cell activity, the more
   radiosensitive it is.
4. The greater the proliferation and growth rate for tissues,
   the greater the radiosensitivity.
   This law concludes that compared to a child or mature
   adult, the fetus is most radiosensitive.