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  2. Membrane transport - Wikipedia

    en.wikipedia.org/wiki/Membrane_transport

    Thermodynamically the flow of substances from one compartment to another can occur in the direction of a concentration or electrochemical gradient or against it. If the exchange of substances occurs in the direction of the gradient, that is, in the direction of decreasing potential, there is no requirement for an input of energy from outside the system; if, however, the transport is against ...

  3. Membrane transport protein - Wikipedia

    en.wikipedia.org/wiki/Membrane_transport_protein

    A membrane transport protein is a membrane protein involved in the movement of ions, small molecules, and macromolecules, such as another protein, across a biological membrane. Transport proteins are integral transmembrane proteins; that is they exist

  4. Mediated transport - Wikipedia

    en.wikipedia.org/wiki/Mediated_transport

    An example of an antiporter mediated transport protein is the sodium-calcium antiporter, a transport protein involved in keeping the cytoplasmic concentration of calcium ions in the cells, low. This transport protein is an antiporter system because it transports three sodium ions across the plasma membrane in exchange for a calcium ion, which ...

  5. Transcellular transport - Wikipedia

    en.wikipedia.org/wiki/Transcellular_transport

    Examples of molecules that follow this process are potassium K +, sodium Na +, and calcium Ca 2+. A place in the human body where this occurs is in the intestines with the uptake of glucose . Secondary active transport is when one solute moves down the electrochemical gradient to produce enough energy to force the transport of another solute ...

  6. Multimodal transport - Wikipedia

    en.wikipedia.org/wiki/Multimodal_transport

    Multimodal transport (also known as combined transport) is the transportation of goods under a single contract, but performed with at least two different modes of transport; the carrier is liable (in a legal sense) for the entire carriage, even though it is performed by several different modes of transport (by rail, sea and road, for example).

  7. Multimodal interaction - Wikipedia

    en.wikipedia.org/wiki/Multimodal_interaction

    Then a multimodal system has to recognize the inputs from the different modalities combining them according to temporal and contextual constraints [3] in order to allow their interpretation. This process is known as multimodal fusion, and it is the object of several research works from the nineties to now.

  8. Neurotransmitter transporter - Wikipedia

    en.wikipedia.org/wiki/Neurotransmitter_transporter

    For example, some transporters use energy obtained by the cotransport, or symport, of Na + in order to move glutamate across membranes. Such neurotransporter cotransport systems are highly diverse, as recent development indicates that uptake systems are generally selective and associate with a specific neurotransmitter.

  9. Transport phenomena - Wikipedia

    en.wikipedia.org/wiki/Transport_phenomena

    Transport phenomena encompass all agents of physical change in the universe. Moreover, they are considered to be fundamental building blocks which developed the universe, and which are responsible for the success of all life on Earth. However, the scope here is limited to the relationship of transport phenomena to artificial engineered systems. [2]