Question

1. list the 3 main types of passive transport:

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________
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9 what is diffusion?

Explanation:

Passive transport is the movement of substances across cell membranes without energy input. The three main types are simple diffusion (movement of small, non - polar molecules down concentration gradient), facilitated diffusion (uses transport proteins for larger or polar molecules down gradient), and osmosis (diffusion of water across a semi - permeable membrane).

Answer:

1. Simple Diffusion
2. Facilitated Diffusion
3. Osmosis