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</topic><topic id="https://vocabulario.abcd.usp.br/pt-br/?tema=89907"><instanceOf><topicRef xlink:href="#term"/></instanceOf><baseName><baseNameString>SISTEMA RENINA-ANGIOTENSINA</baseNameString></baseName>  <occurrence>    <instanceOf>      <topicRef xlink:href="#scope-note"/>    </instanceOf><baseName><baseNameString><![CDATA[ Sistema que regula a pressão sanguínea constituído pela Renina, Angiotensinogênio, enzima conversora da Angiotensina (ver Peptidil Dipeptidase A), Angiotensina I e Angiotensina II e Angiotensinase. Arenina, uma enzima produzida no rim, atua sobre o Angiotensinogênio, uma alfa-2 globulina produzida pelo fígado, formando a Angiotensina I. A enzima conversora da Angiotensina contida no pulmão atua sobre a Angiotensina I no plasma convertendo-a em Angiotensina II, um vasoconstritor potente. a Angiotensina II causa a contração do músculo liso vascular renal e das arteríolas, levando à retenção de sal e água no rim e aumento da pressão arterial. além disso, a Angiotensina II estimula a liberação de Aldosterona do Córtex Suprarrenal, que por sua vez também aumenta a retenção de sal e água no rim. a enzima conversora da Angiotensina quebra também a Bradicinina, um vasodilatador potente e componente do Sistema Calicreína-Cinina. <p>Fonte: DeCS. Disponível em: http://decs.bvs.br.<p> ]]></baseNameString></baseName>  </occurrence></topic>  <association>    <instanceOf>      <topicRef xlink:href="#broader-narrower"/>    </instanceOf>    <member>      <roleSpec>  <topicRef xlink:href="#narrower"/>      </roleSpec>      <topicRef xlink:href="#https://vocabulario.abcd.usp.br/pt-br/?tema=89907"/>    </member>    <member>      <roleSpec>  <topicRef xlink:href="#broader"/>      </roleSpec>      <topicRef xlink:href="#https://vocabulario.abcd.usp.br/pt-br/?tema=63462"/>    </member>  </association></topicMap>