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Cell Transport Vocab

This is to help me study my sience vocab.

TermDefinition
selectively permeable Property of cell membranes that allows some substances to pass across it, while others cannot.
passive transport Movement of dissolved materials across a cell membrane without using cellular energy.
diffusion Process by which molecules move from an area of higher concentration to an area of lower concentration.
osmosis The diffusion of water molecules across a selectively permeable membrane.
active transport Movement of materials across a cell membrane using cellular energy (low concentration to high concentration).
endocytosis Process by which the cell membrane takes particles into the cell by changing shape and engulfing the particles.
exocytosis The process by which the vacuole surrounding particles fuses with the cell membrane to allow large particles to leave the cell.
phospholipids A molecule that makes up the bilayer of biological membranes, having a polar, hydrophilic (phosphate) head and two non-polar, hydrophobic (lipid) tails.
protein channels A protein that allows the transport of specific substances across a cell membrane through facilitated diffusion.
facilitated diffusion Movement of specific molecules across cell membranes through protein channels.
hypotonic Referring to a solution that, when surrounding a cell, will cause the cell to gain water.
hypertonic Referring to a solution that, when surrounding a cell, will cause the cell to lose water.
Strawberry sprinkled with sugar. Causes water to move out of the strawberry.
Fresh water fish in salt water tank. Water would move out of the fish's cells and into the saltwater. The cells of the fish would shrivel.
Salt water fish in fresh water tank. Water would move into the fish's cells and cause the cells to swell.
Created by: Michael Studies
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