leakage channel

(noun)

The simplest type of ion channel, with more or less constant permeability.

Related Terms

  • ion pump
  • ligand-gated channel

Examples of leakage channel in the following topics:

  • Ion Channels

    • Leakage channels are the simplest type of ion channel, in that their permeability is more or less constant.
    • The types of leakage channels with the greatest significance in neurons are potassium and chloride channels.
    • There are three main types of gated channels: chemically-gated or ligand-gated channels, voltage-gated channels, and mechanically-gated channels.
    • Voltage-gated ion channels, also known as voltage-dependent ion channels, are channels whose permeability is influenced by the membrane potential.
    • Ligand-gated ion channels (LGICs) are one type of ionotropic receptor or channel-linked receptor.
  • Nerve Impulse Transmission within a Neuron: Resting Potential

    • Ion channels have different configurations: open, closed, and inactive .
    • Ion channels that change their structure in response to voltage changes are called voltage-gated ion channels.
    • The cell possesses potassium and sodium leakage channels that allow the two cations to diffuse down their concentration gradient.
    • However, the neurons have far more potassium leakage channels than sodium leakage channels.
    • At the peak action potential, K+ channels open and the cell becomes (c) hyperpolarized.
  • Nerve Impulse Transmission within a Neuron: Action Potential

    • The action potential travels down the neuron as Na+ channels open.
    • The Na+ channels close, beginning the neuron's refractory period.
    • Eventually, the extra K+ ions diffuse out of the cell through the potassium leakage channels, bringing the cell from its hyperpolarized state back to its resting membrane potential.
    • The flow of ions through these channels, particularly the Na+ channels, regenerates the action potential over and over again along the axon.
    • Nodes contain voltage-gated K+ and Na+ channels.
  • Channel Integration

    • The integration of marketing channels to varying degrees is known either as multi-channel or omni-channel retailing.
    • The integration of marketing channels involves a process known as multi-channel retailing.
    • Omni-channel retailing is very similar to, and an evolution of, multi-channel retailing.
    • The omni-channel consumer wants to use all channels simultaneously and retailers using an omni-channel approach will track customers across all channels, not just one or two.
    • Merchandise and promotions are not channel specific, but rather consistent across all retail channels.
  • Channels for Consumer Goods

    • Channels don't always make sense.
    • The channel mechanism also operates for service products.
    • The channel operates 24 hours a day and exists in an environment where change is the norm.
    • Finally, channels should have certain distribution objectives guiding their activities.
    • Channels usually represent the largest costs in marketing a product.
  • Urinary Incontinence

    • Urinary incontinence (UI) is any involuntary leakage of urine.
  • Channels for Industrial Goods

    • A marketing channel is the network of organizations that work together to provide goods for consumption.
    • This definition implies several important characteristics of the channel.
    • Yet all must be recognized, selected, and integrated into an efficient channel arrangement.
    • The channel operates 24 hours a day and exists in an environment where change is the norm.
    • This trade channel is feasible when agents cannot directly sell to industrial users.
  • Selecting Marketing Channels

    • Channels can range in levels from two to several (five being typical).
    • The type of product dictates the number of marketing channels to use.
    • Once the number of levels is decided, the channel manager must determine the actual number of channel components involved at each level.
    • Regardless of the channel framework selected, channels usually perform better if someone is in charge, providing some level of leadership.
    • Given the restrictions inherent in channel leadership, the final question is always "who should lead the channel?
  • Channel

    • The channel is the method (auditory and visual) that is used to transmit the message to the receiver.
    • These cues are received by the listeners through the visual part of the channel: their sense of sight.
    • The speaker uses a channel to transmit the message to the audience.
    • The channel in the middle links the speaker with the receiver of the message.
    • Give examples of auditory and visual channels used in public speaking
  • The Significance of Marketing Channels

    • A channel performs three important functions.
    • Not all channel members perform the same function.
    • Second, all channel institutional members are part of many channel transactions at any given point in time.
    • A channel strategy is evident.
    • Identify the types of institutions that participate in marketing channels, and the three primary functions of these channels
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