Lecture3_Diffusion&Osmosis.pptx

Lecture3_Diffusion&Osmosis.pptx - Chapter 6 Lipids...

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Chapter 6 Lipids, Membranes, and the First Cells
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Reminders and Important Info Please be sure to check your attendance points after class today and contact me if there are any problems so that we can make sure you are registered in the system. Make sure to sign up for Mastering Biology so you can do homework assignments— first one is due Sunday. o If you need temporary access let me know ASAP. Let’s clarify snow policy……
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Movement Across Membranes Today we are going to start our discussion on how molecules move across the cell membrane.
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Movement Across Membranes Remember that small molecules can cross the membrane readily and without energy.
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Movement Across Membranes But how is this movement possible? Diffusion!!
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Diffusion Remember that all solutes are in constant, random motion thanks to thermal energy, with solutes moving randomly in all directions.
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Diffusion Sometimes, a difference in solute concentration is present and creates a concentration gradient.
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