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9th grd Passive Cell

QuestionAnswer
cell membrane also called the plasma membrane, separates the interior of all cells from its outside environment
concentration gradient the difference in the concentration of a substance between two areas
crenation a process resulting from osmosis in which red blood cells undergo shrinkage and acquire a notched surface
diffusion the net movement of small or uncharged particles from an area of high concentration to an area of low concentration
equilibrium once a substance has fully dispersed through a medium
extracellular space the space outside of the cell membrane but part of a multicellular organism
facilitated diffusion movement of particles from an area of high concentration to an area of low concentration-the particles cannot move directly so they move through channel proteins which function like doorways in the cell membrane
flaccid when the flow of water into the cell and out of the cell exists in equilibrium in a plant cell
hypertonic having a higher osmotic pressure than a particular fluid
hypotonic having a lower osmotic pressure than a particular fluid
hydrophilic having a tendency to mix with, dissolve in or be wetted by water
hydrophobic lacking an affinity (love) for water, insoluble in water or repels water
intracellular space the space within the organism's cells
isotonic solution with the same osmotic pressure as some other solution
lipid bilayer thin polar membrane made of 2 layers of lipid molecules
lysis the disintegration of a cell by rupture of the cell wall or cell membrane
osmosis the spontaneous passage or diffusion of water or other solvents through a semipermeable membrane
partially permeable membrane a membrane that is permeable to the small molecules of water and certain solutes but does not allow the passage of large solute molecules
passive transport process of moving substances in and out of a cell and requires no energy expenditure
phosolipid found in the cell membrane-has 2 parts the head (hydrophilic) and the tail (hydrophobic)
plasmolysis a process resulting from osmosis in which when water flows from an area of high concentration to an area of low concentration and causes the cell membrane to shrink away from the cell wall of a plant cell
surface area to volume ratio the area on a cell's surface compared to the area inside the cell
transport protein protein that serves the function of moving other materials within an organism
turgid the state of being swollen especially due to high fluid content
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