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critical membrane potential
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critical membrane potential

physiology

Learn about this topic in these articles:

cardiac muscle contraction

  • striated muscle; human biceps muscle
    In muscle: The frequency of contraction

    …potential is depolarized to a critical potential (Ecrit), a self-generating action potential follows, leading to muscle contraction. Phase 0, the upstroke, is associated with a sudden increase in membrane permeability to Na+. Phases 1, 2, and 3 result from changes in membrane permeability and conductance to Na+, K+, and Ca2+.

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