click below
click below
Normal Size Small Size show me how
Radbio3
Review ch1-5
Question | Answer |
---|---|
Basal cells, intestinal crypt cells and reproductive cells have what in common? | They are all highly radiosensitive. |
A biological reaction is produced by 3 gy. It takes 12 gy of 250 kvp of x-radiation to produce the same reaction. What is the RBE? | 12/3=4. |
cancer and genetic effects are what kind of effects? | Stochastic. |
Linear, nonthreshold curve implies that the biologic response is what kind of relationship? | Direct. |
DNA, RNA, Protein. List in order starting with the most radiosensitive. | DNA, RNA, protein. |
muscle, lymphocytes, osteoblasts, fibroblasts, which has low radiosensitivity? | Muscle. |
If cell death occurs before mitosis this is known as: | Interphase death. |
A free radical has a single unpaired___in its outer shell. | electron. |
What kind of damage is responsible for late radiation effects? | Point lesions. |
T OR F? All damage to DNA is irreverseable. | False. |
regarding OER, Alpha does not need the help of oxygen. T or F? | True. |
The higher the LET the___ the OER. | lower. |
OER is___ for x-rays than for alpha particles. | Greater. |
In a non oxygen state you need more radiation. T or F? | True. |
Mitosis is a subphase of interphase. | False. |
Give 3 other names for immature cells: | Stem, precursor and undifferentiated. |
The rate at which energy is deposited as a charged particle travels through matter is called: | LET. |
The 'powerhouses' of the cell is known as: | Mitochondria. |
Protein synthesis takes places in: | cytoplasm. |
The patient recieved 250m__ following a L-spine. | Gy. |
What unit is used for worker dose? | Sv/rem. |
The radioalysis of water involves the ___theory. | Indirect theory. |
The annual occupational exposure limit is: | 5 rem. or .05 SV. |
An X-ray machine produces 143___ when 120 kvp and 80 mas is used. | Roentgen. |
Indirect theory occurs when ___ molecules are modified due to exposure. | Water. |
What unit is used to describe patient dose? | RAD. |
Who discovered X-rays and when? | Roentgen, 1895. |
What is erythema? | Reddening of the skin. |
Which agency regulates the radiation exposure of rad. personnel? | NCRP |
What is the term for nondividing cell cycle segment? | Interphase. |
Which cell cycle phase is most radioresistant? | S. |
Which process of cell division has the purpose to form two identical cells? | Meiosis. |
The greater the LET the ___ the chance for a biologic reaction. | Greater. |