
POTENCIAL DE AÇÃO
Authored by Tatiane Rondini
Biology
University
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Identifique a afirmativa que descreve o neurônio no potencial de repouso.
Potencial 0 milivolts
Quando a concentração de sódio é de 40 M.
Quando existe um balanço preciso de fluxo de íons positivos e negativos
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Aponte o canal de membrana dos neurônios envolvidos no retorno ao potencial de repouso
Cl-
Na+
Ca+
K+
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Quando os canais de Na+ são abertos, o que acontece com o potencial da membrana?
apresenta esquivalência elétrica entre os meios intra e extra celular.
Torna-se mais negativa.
Torna-se menos negativa
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Potencial de membrana é:
pequeno excesso de carga positiva ou negativa
de +40 milivolts.
diferença de voltagem através da membrana
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
No Potencial de repouso da membrana observa-se:
diferença de voltagem através da membrana celular, em condições basais
potencial positivo da célula em repouso
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
O neurônio em repouso tem:
seu interior negativo comparado com o meio externo
seu interior negativo comparado com o núcleo
seu interior positivo
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Nos neurônios, um estímulo desencadeia atividade elétrica na membrana plasmática iniciando com abertura de:
canais de sódio
canais de cloro
canais de potássio
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