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Application of Radioactivity

The radioisot...

Question

The radioisotopes used for diagnosis in nuclear medicine

A

have short half-lives

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B

travel rapidly through tissue

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C

are usually gamma emitters

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D

all of these

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Solution

A radioisotope used for diagnosis must emit gamma rays of sufficient energy to escape from the body and it must have a half-life short enough for it to decay away soon after imaging is completed.

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The radioisotopes used for diagnosis in nuclear medicine

Q. is the answer for why are molecular movements essential for life corect or not ans living organisms hv well organised structures they can hv tissues tissue hv cells and cells hv useful components.becuz of the effect of environment this living structure may break down. if order breaks down the organism will no longer be alive so lving creatures must keeep repairing these structures . since all these structures are made uo of molecule , they must move molecules around all time

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