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4_Diffusion_Osmosis_Active_Transport

Of molecules across plasma membrane movement only

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of molecules across plasma membrane. Movement only occurs in the presence of a concentration gradient. Some molecules move across the membrane more quickly if diffusion is facilitated by a carrier molecule. Image: Facilitated Diffusion , M. Ruiz From the Virtual Cell Biology Classroom on ScienceProfOnline.com
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Passive Transport - Osmosis Q: Diffusion of what across the plasma membrane? Environment surrounding cells may contain amounts of dissolved substances (solutes) that are… - equal to - less than - greater than …those found within the cell. Images: Osmosis animation CELL Plasma membrane Liquid environment outside the cell. Liquid environment inside the cell. From the Virtual Cell Biology Classroom on ScienceProfOnline.com
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Tonicity and Osmosis __________: equal concentration of a solute inside and outside of cell. __________: a higher concentration of solute. __________: a lower concentration of solute. Images: Osmosis with RBCs , M. Ruiz Water will always move toward a hypertonic environment!! Passive Transport - Osmosis From the Virtual Cell Biology Classroom on ScienceProfOnline.com
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Let’s do some osmosis problems, to practice our knowledge. CELL Plasma membrane Liquid environment outside the cell.
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