absolute refractory period

(noun)

The period from the opening of the sodium channels until the sodium channels begin to reset.

Related Terms

Examples of absolute refractory period in the following topics:

  • The Action Potential and Propagation

    • First is depolarization, followed by repolarization and a short period of hyperpolarization.
    • A period of increased potassium permeability results in excessive potassium efflux before the potassium channels close.
    • The propagation of action potential is independent of stimulus strength but dependent on refractory periods.
    • The period from the opening of the sodium channels until the sodium channels begin to reset is called the absolute refractory period.
    • During this period, the neuron cannot respond to another stimulus, no matter how strong.

  • Absolute Advantage and the Balance of Trade

    • Absolute advantage and balance of trade are two important aspects of international trade that affect countries and organizations.
    • Absolute advantage and balance of trade are two important aspects of international trade that affect countries and organizations .
    • Adam Smith first described the principle of absolute advantage in the context of international trade, using labor as the only input.
    • Since absolute advantage is determined by a simple comparison of labor productivities, it is possible for a party to have no absolute advantage in anything; in that case, according to the theory of absolute advantage, no trade will occur with the other party.
    • The balance of trade (or net exports, sometimes symbolized as NX) is the difference between the monetary value of exports and imports in an economy over a certain period.

  • Absolute Advantage Versus Comparative Advantage

    • Absolute advantage compares the productivity of different producers or economies.
    • The accompanying figure shows the amount of output Country A and Country B can produce in a given period of time .
    • In other words, Country A has an absolute advantage in making both food and clothing.
    • Absolute advantage is important, but comparative advantage is what determines what a country will specialize in.
    • Country A has an absolute advantage in making both food and clothing, but a comparative advantage only in food.

  • Male Sexual Response

    • After orgasm and ejaculation, a refractory period usually ensues and is characterized by loss of erection, a decline in any sex flush, decreased interest in sex, and a feeling of relaxation associated with the action of the neurohormones oxytocin and prolactin.
    • The intensity and duration of the refractory period can be very short in a highly aroused young man in a highly-arousing situation, perhaps without even a noticeable loss of erection.

  • Stages of the Action Potential

    • Refractory Phase.
    • The refractory phase takes place over a short period of time after the depolarization stage.
    • During the refractory phase this particular area of the nerve cell membrane cannot be depolarized.
    • Therefore, the neuron cannot reach action potential during this "rest period."

  • Mechanics of the Action Potential

    • Refractory Phase.
    • The refractory phase is a short period of time after the repolarization stage.
    • During the refractory phase this particular area of the nerve cell membrane cannot be depolarized; the cell cannot be excited.

  • Disease Severity and Duration

    • In an infectious disease, the incubation period is the time between infection and the appearance of symptoms.
    • The latency period is the time between infection and the ability of the disease to spread to another person, which may precede, follow, or be simultaneous with the appearance of symptoms.
    • During that time, it may be constantly present, or it may go into remission and periodically relapse.
    • A refractory disease is a disease that resists treatment, especially an individual case that resists treatment more than is normal for the specific disease in question.
    • Discuss the severity and various types of disease duration, including: acute, chronic, flare-up, refractory, progressive, remission and a cure

  • Nerve Impulse Transmission within a Neuron: Action Potential

    • The Na+ channels close, beginning the neuron's refractory period.
    • The hyperpolarized membrane is in a refractory period and cannot fire. (5) The K+ channels close and the Na+/K+ transporter restores the resting potential.

  • Plantar Fasciitis

    • It is commonly associated with long periods of weight bearing.
    • Treatment options for plantar fasciitis include rest, massage therapy, stretching, weight loss, night splints, motion control running shoes, physical therapy, cold therapy, heat therapy, orthotics, anti-inflammatory medications, injection of corticosteroids and surgery in refractory cases.

  • Examples

    • Note well that the convergence is slowest at the origin, where the absolute value function is not differentiable.
    • It's because we've assume the function is periodic on the interval $[-1,1]$.
    • The {\it periodic extension} of $f(x) = x$ must therefore have a sort of sawtooth appearance.
    • In other words any non-periodic function defined on a finite interval can be used to generate a periodic function just by cloning the function over and over again.
    • What would the periodic extension of $f(x) = x$ look like relative to the interval $[-.5,.5]$?