Final answer:
Passive and active transport mechanisms exist for moving non-lipid-soluble substances across membranes, each utilizing different processes and energy requirements.
Explanation:
True
Both active and passive transport mechanisms exist to move non-lipid-soluble substances across membranes. Passive transport allows substances to move from areas of high concentration to low concentration without requiring cellular energy, while active transport requires energy to move substances against their concentration gradient.
Facilitated diffusion is an example of passive transport where a transport protein assists in the movement of molecules like glucose through the membrane. In contrast, active transport, such as the sodium-potassium exchange pump, uses ATP energy to move molecules against their concentration gradient.
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