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-Osmosis is the spontaneous net movement of water across a semipermeable membrane from a region of low solute concentration to a more concentrated solution, up a concentration gradient.(LOW to HIGH) *ONLY WHEN SPEAKING ABOUT WATER!!!
Cells placed is hypertonic, hypotonic, or isotonic solutions react how? (HYPO=EXPLODE) HYPER=SHRINK (ISO=EQUILIBRIUM)
- hypotonic solution, water will rush in and it will explode.
- hypertonic solution, water will diffuse out and cause cell shrinkage and injury.
- isotonic solution, there will be no difference in net movement of water meaning equilibrium and is ideal.
-Facilitated diffusion is the process of spontaneous passive transport of molecules or ions across a biological membrane via specific transmembrane integral ---proteins.
-Active Transport requires energy as things are moving against concentration gradient across cell membrane from low to high instead of high to low.
-Endocytosis
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