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  2. Potassium channel - Wikipedia

    en.wikipedia.org/wiki/Potassium_channel

    Potassium channel Kv1.2, structure in a membrane-like environment. Calculated hydrocarbon boundaries of the lipid bilayer are indicated by red and blue lines.. Potassium channels are the most widely distributed type of ion channel found in virtually all organisms. [1]

  3. Kahoot! - Wikipedia

    en.wikipedia.org/wiki/Kahoot!

    In 2017, Kahoot! had raised $26.5 million in funding from Northzone, Creandum and Microsoft Ventures. [7] On October 11, 2018, Kahoot! was valued at $300 million. [8] As of 11 June 2020, Kahoot! was valued at $1.5 billion and raised further capital from Northzone. [9] In 2019, Kahoot! acquired the Scandinavian education company Poio. [10]

  4. Membrane channel - Wikipedia

    en.wikipedia.org/wiki/Membrane_channel

    Membrane channels are a family of biological membrane proteins which allow the passive movement of ions (ion channels), water or other solutes to passively pass through the membrane down their electrochemical gradient. They are studied using a range of channelomics experimental and mathematical techniques.

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  6. Intracellular pH - Wikipedia

    en.wikipedia.org/wiki/Intracellular_pH

    Physiologically normal intracellular pH is most commonly between 7.0 and 7.4, though there is variability between tissues (e.g., mammalian skeletal muscle tends to have a pH i of 6.8–7.1). [4] [5] There is also pH variation across different organelles, which can span from around 4.5 to 8.0. [6] [7] pH i can be measured in a number of ...

  7. Membrane - Wikipedia

    en.wikipedia.org/wiki/Membrane

    Where Qp is the permeate stream flowrate [kg·s −1], F w is the water flux rate [kg·m −2 ·s −1] and A is the membrane area [m 2] The permeability (k) [m·s −2 ·bar −1] of a membrane is given by the next equation: = The trans-membrane pressure (TMP) is given by the following expression:

  8. Aquaporin - Wikipedia

    en.wikipedia.org/wiki/Aquaporin

    Aquaporins, also called water channels, are channel proteins from a larger family of major intrinsic proteins that form pores in the membrane of biological cells, mainly facilitating transport of water between cells. [1] The cell membranes of a variety of different bacteria, fungi, animal and plant cells contain aquaporins through which water ...

  9. Biological membrane - Wikipedia

    en.wikipedia.org/wiki/Biological_membrane

    Cross-sectional view of the structures that can be formed by phospholipids in an aqueous solution. A biological membrane, biomembrane or cell membrane is a selectively permeable membrane that separates the interior of a cell from the external environment or creates intracellular compartments by serving as a boundary between one part of the cell and another.