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UNIVERSIDADE FEDERAL DE JUIZ DE FORA FACULDADE DE MEDICINA INSTITUTO DE CIÊNCIAS BIOLÓGICAS DEPARTAMENTO DE FISIOLOGIA Questionário de Revisão – Disciplina de Biofísica Médica Bioeletricidade Monitor: Cássio Francisco Gonçalves cassio.goncalves@outlook.com 1) Defina potencial de repouso das membranas. __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ 2) Quais as causas da negatividade elétrica no interior das células? __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ 3) Quais fatores contribuem para a gênese do potencial de repouso das membranas? __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ 4) O que é potencial de equilíbrio de um íon? __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ 5) O que mostra a equação da condutância de corda? __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ 6) Defina potencial de ação e cite algumas importâncias deste fenômeno. __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ 7) Quais tipos de células são capazes de transmitir um potencial de ação? __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ 8) Como é feito o controle da entrada de Na+ na célula em potencial de ação? __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ 9) Explique o platô na curva de potencial de ação do músculo cardíaco e dê sua importância fisiológica. __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ ________________________________________________________________________________________________________
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