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| Molecules that raise the hydrogen ion concentration in a solution and lower its pH numerically. |
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| Molecules that lower the hydrogen ion concentration in a solution and raise the pH numerically. |
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| Substance(s) that tend to resist pH changes of a solution, stabilizing its relative acidity and basicity. |
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| Iron-containing pigment in red blood cells that combines with and transports oxygen. |
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| Weak bond between a slightly positive hydrogen atom of one molecule and a slightly negative atom of another molecule. Or between parts of the same molecule. |
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| Type of molecule that interacts with water by dissolving in water and/or forming hydrogen bonds with water molecules. |
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| Type of molecule that does not interact with water because it is nonpolar. |
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| Lubricates cell parts and body structures and reduces friction. E.g. tears and saliva |
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| A scale that measures the hydrogen ion concentration. It indicates the strength of an acid or basic/alkaline solution. |
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| Unequal charge on opposite points. E.g. slight positive charge on hydrogen side and slight negative charge on oxygen side, making water a polar molecule. |
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| Fluids that dissolves solutes. |
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| Many H-bonds cause water to absorb large amounts of heat or release heat (energy) slowly, protecting cells from rapid temperature change. |
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