Aircrew and Spacecrew Radiation Exposure - media.cns-snc.ca
Aircrew and Spacecrew Radiation Exposure - media.cns-snc.ca
Aircrew and Spacecrew Radiation Exposure - media.cns-snc.ca
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Biologi<strong>ca</strong>l Effects of Ionizing <strong>Radiation</strong><br />
• Ionizing radiation <strong>ca</strong>uses atoms <strong>and</strong> molecules to become ionized or excited:<br />
– Produce free radi<strong>ca</strong>ls<br />
– Break chemi<strong>ca</strong>l bonds<br />
– Produce new chemi<strong>ca</strong>l bonds <strong>and</strong> cross-linkage between macromolecules<br />
– Damage molecules that regulate vital cell processes (e.g. DNA, RNA, proteins).<br />
• Tissues that undergo rapid cell regeneration are most<br />
sensitive to radiation (e.g., blood-forming organs,<br />
reproductive organs, <strong>and</strong> lymphatic system)
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