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26 Cards in this Set
- Front
- Back
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what are the two components of a phosphlooid |
the hydrophilic and hydrophobic |
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define hydrophilic |
the head of the phosphlooid water loving and usually made of phosphate |
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define hydrophobic |
tail of phosphlooid water fearing and made of fatty acids |
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define semi permeable membrane |
a membrane that only allows certain things to cross it |
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define browanian motion |
particles are in constant motion |
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define concerntration gradient |
the difference i concentration between two adjacent areas |
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define selective transport |
something that controls what crosses is due to size shape and charge |
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define equilibrium |
when there are equal concentrations |
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what are the two types of transport |
active and passive |
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define active transport |
the method of transport that uses energy called ATPs and moves against the concentration gradient |
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define passive transport |
the method of transport that uses no energy and movies down the concentration gradient |
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what are the types of passive transport |
facilitated diffusion , hypotonic and hypertonic |
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define facilitated diffusion |
allows diffusion of larger particles |
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define hypertonic |
when there is more water inside the cell so water moves out |
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define hypotonic |
when there is more water outside the cell so water moves into the cell |
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define endocytosis |
when a membrane from a pocket around the substance and then pinches off and takes substance into the cell |
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define pinocytosis |
the process of endocytosis used for fluids
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define phagocytosis |
the process of endocytosis used in solids or food |
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define receptor mediator endocytosis |
proteins produced from membrane that detect a specific substance and transport it |
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define carrier proteins |
proteins that use energy and are specifically shaped to push through molecules |
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define channel proteins |
proteins that are like a channel or tube that are used fro transport of smaller ions |
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define exocytosis |
the process were the membrane surrounds the substance and takes it out of the cell |
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define diffusion |
the motion of particles traveling from an area of high concentration to low concentration |
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define osmosis |
the diffusion of water through a membrane |
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what are the two types of transport proteins |
channel and carrier |
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how do you find the SA/V ratio |
divide the surface area by the volume |
