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  • Which type of transport is used to move a molecule from region low concentration o high concentration?
    The type of transport used to move a molecule from a region of low concentration to a region of high concentration is active transport .

    Här är varför:

    * Aktiv transport requires energy to move molecules against their concentration gradient. This means moving them from an area where they are less concentrated to an area where they are more concentrated. Denna process är avgörande för att celler ska bibehålla den nödvändiga koncentrationen av molekyler inuti dem, även när den yttre miljön har en annan koncentration.

    * Passiv transport , on the other hand, does not require energy and relies on the concentration gradient to drive the movement of molecules. Molecules move from high concentration to low concentration.

    Examples of active transport include:

    * natriumpotassiumpump: Denna pump rör sig natriumjoner ut ur cellen och kaliumjoner i cellen, båda mot deras koncentrationsgradienter.

    * Glucose uptake in the small intestine: Glucose is transported from the small intestine into the bloodstream against its concentration gradient.

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