Irradiation and Contamination 1

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First	First	Last	Quiz Score Total	Question 1	Image 1a	1a) The syringe is sealed inside a plastic wrapper. What is the purpose of this?	1b) What is the advantage of using irradiation to sterilise equipment compared to sterilisation by heating?	1c) Explain why the syringe does not become radioactive after it has been irradiated?	1d) Why is it important that medical workers are not exposed to gamma radiation from the steriliser?	1e) Medical workers who use beta or gamma radiation often wear lead aprons. Explain why these are not required when working with alpha radiation?	Quiz Percentage Grade
ppefmh	Ed	Garstin	1/2	The diagram below shows a medical syringe being sterilised by irradiation with gamma rays.		gdfg	Irradiation kills more microbes than heating. Some equipment is damaged by heating. Heating is slower than irradiation.	gdfg	Gamma radiation is ionising and penetrating. If a worker is exposed to gamma radiation, it can pass through their skin and ionise molecules in the worker's cells. This will increase the risk of the worker developing cancer. Gamma radiation is ionising and non-penetrating. If a worker is exposed to gamma radiation, it cannot pass through their skin and ionise molecules in the worker's cells. This why the radiation is safe to humans.	gdfg	50%
First	First	Last	Quiz Score Total	Question 1	Image 1a	1a) The syringe is sealed inside a plastic wrapper. What is the purpose of this?	1b) What is the advantage of using irradiation to sterilise equipment compared to sterilisation by heating?	1c) Explain why the syringe does not become radioactive after it has been irradiated?	1d) Why is it important that medical workers are not exposed to gamma radiation from the steriliser?	1e) Medical workers who use beta or gamma radiation often wear lead aprons. Explain why these are not required when working with alpha radiation?	Quiz Percentage Grade