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  2. Potassium in biology - Wikipedia

    en.wikipedia.org/wiki/Potassium_in_biology

    The sodium–potassium pump a critical enzyme for regulating sodium and potassium levels in cells. Potassium is the main intracellular ion for all types of cells, while having a major role in maintenance of fluid and electrolyte balance. [1] [2] Potassium is necessary for the function of all living cells and is thus present in all plant and ...

  3. 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 ...

  4. Active transport - Wikipedia

    en.wikipedia.org/wiki/Active_transport

    These proteins have receptors that bind to specific molecules (e.g., glucose) and transport them across the cell membrane. Because energy is required in this process, it is known as 'active' transport. Examples of active transport include the transportation of sodium out of the cell and potassium into the cell

  5. Potassium - Wikipedia

    en.wikipedia.org/wiki/Potassium

    Potassium ions are vital for the functioning of all living cells. The transfer of potassium ions across nerve cell membranes is necessary for normal nerve transmission; potassium deficiency and excess can each result in numerous signs and symptoms, including an abnormal heart rhythm and various electrocardiographic abnormalities. Fresh fruits ...

  6. Homeostasis - Wikipedia

    en.wikipedia.org/wiki/Homeostasis

    The fat cells take up glucose through special glucose transporters , whose numbers in the cell wall are increased as a direct effect of insulin acting on these cells. The glucose that enters the fat cells in this manner is converted into triglycerides (via the same metabolic pathways as are used by the liver) and then stored in those fat cells ...

  7. Membrane transport protein - Wikipedia

    en.wikipedia.org/wiki/Membrane_transport_protein

    Potassium channels are typically involved in the transport of potassium ions across the cell membrane to the outside of the cell, which helps maintain the negative membrane potential of cells. As there are more potassium channels than sodium channels, more potassium flows out of the cell than sodium into a cell, thus why the membrane potential ...

  8. Membrane transport - Wikipedia

    en.wikipedia.org/wiki/Membrane_transport

    One of the most important pumps in animal cells is the sodium potassium pump, that operates through the following mechanism: [9] binding of three Na + ions to their active sites on the pump which are bound to ATP. ATP is hydrolyzed leading to phosphorylation of the cytoplasmic side of the pump, this induces a structure change in the protein.

  9. 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] They form potassium-selective pores that span cell membranes.