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Crossing Membranes Passive Processes
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Usually each channel protein is specific to one type of ion

Slide 16

Channel proteins can open or close their pores acting like gates depending upon the cell’s needs

Channel proteins can open or close their pores acting like gates depending upon the cell’s needs

Slide 17

Carrier proteins are more sophisticated in the way they work

Carrier proteins are more sophisticated in the way they work

They allow the diffusion across the membrane of larger polar molecules, such as sugars and amino acids

Slide 18

Once a particular molecule attaches to the carrier protein at it binding site, the carrier protein changes its shape to ‘deliver’ the molecule through the membrane

Once a particular molecule attaches to the carrier protein at it binding site, the carrier protein changes its shape to ‘deliver’ the molecule through the membrane

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