What are the different types of transport mechanisms across the cell membrane?

There are three main types of transport mechanisms across the cell membrane: passive transport, active transport, and facilitated transport. Passive transport involves the movement of molecules across the membrane without the input of energy, driven by the concentration gradient. Active transport requires energy in the form of ATP to move molecules against their concentration gradient. Facilitated transport uses carrier proteins to help molecules move across the membrane, also driven by the concentration gradient. Each of these mechanisms plays a crucial role in maintaining cellular homeostasis and allowing for the exchange of nutrients and waste products within the cell.

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