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21 Cards in this Set
- Front
- Back
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gives cell membranes a flexible structure that forms a strong barrier between the cell & it's surroundings
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Lipid Bilayer
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driving force behind the movement of many substances across the cell membrane
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diffusion
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process of diffusion which molecules pass across the cell membrane through the cell membrane channels
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facilitated diffusion
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a pore that lets water pass across cell membrane
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aquaporin
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diffusion of water through a selectively permeable membrane
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osmosis
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equal number of solutes
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isotonic
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high conc of solutes
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hypertonic
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low conc of solutes
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hypotonic
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the pressure needed to counteract osmosis
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osmotic pressure
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relatively constant internal physical & chemical conditions
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homeostasis
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a group of similar cells that perform similar functions
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tissue
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tissues working together
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organ
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a group of organs that work together to perform similar functions
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organ system
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responds to chemical signals
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receptors
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energy of molecules in motion
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kinetic energy of molecules
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evenly spread out
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equalibrium
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difference in concentrations
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concentration gradient
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does not require energy
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passive transport
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does require energy against concentration gradient
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active transport
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taking in material
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endocytosis
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releasing material
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exocytosis
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