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2 March, 15:53

When neurons "fire," the first thing that happens is that sodium ions enter the cell. this does not require an input of energy. what can you infer from this?

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  1. 2 March, 16:18
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    Answer;

    One can infer that membrane transport proteins are required in order for neurons to fire.

    Explanation;

    Transport proteins are proteins that transport substances across biological membranes. Transport proteins are found within the membrane itself, where they form a channel, or a carrying mechanism, to allow their substrate to pass from one side to the other.

    -Transport proteins transport materials such as; ions such as sodium and potassium; sugars such as glucose; proteins and messenger molecules; and many more. In neurons, they play a fundamental role in the functioning of nerve cells. These transporters, a third class of membrane transport proteins, move a wide variety of ions and molecules across cell membranes.
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