Flashcards
Cell Transport 9th grade Biology Quiz
Flashcards do conjunto (20)
- 1dynamic equilibriuma system in a steady state since forward reaction and backward reaction occur at the same rate.
the rate of loss is equal to the rate of gain. - 2facilitated diffusionuses transport proteins to move other ions and small molecules across the plasma membrane
- 3osmosisthe diffusion of water across a selectively permeable membrane.
- 4solutethe substance to be dissolved {sugar}
- 5solventthe one doing the dissolving {water}
- 6isotonic solutionwhen a cell is in a solution that has the same concentration of water and solutes---ions, sugars, proteins, and other substances-----as its cytoplasm, the cell.
iso- in Greek mean equal. - 7hypotonic solutionIf a cell is in a solution that has a lower concentration of solute; hypo- is a Greek word mending under
- 8hypertonic solutionthe concentration of the solute outside of the cell is higher than inside; hyper- is a Greek word meaning above
- 9active transportsometimes substances must move from a region of lower concentration to a region of higher concentration against the passive movement from higher to lower concentration. this movement of substances across the plasma membrane against a concentration gradient requires energy.
- 10passive transportdiffusion of water and facilitated diffusion of other substances require no additional input of energy because the particles are moving from an area of higher concentration to an area of lower concentration
- 11endocytosisthe process by which a cell surrounds a substance in the outside environment, enclosing the substance in a portion of the plasma membrane
- 12exocytosisthe secretion of materials at the plasma membrane (depositated)
- 13phospholipid bilayerserves as the framework in which the other components of the membrane are embedded
_________
0 0 0 0 0
ii ii ii ii ii
!! !! !! !! !!
0 0 0 0 0
_________ - 14polar/non polar partspolar: also known as hydrophilic face outward where they interact with the water inside and outside of the cell.
nonpolar: also known as hydrophobic face the interior bilayer, where they are shielded from water
0 0 0 0 polar
ii ii ii ii nonpolar
!! !! !! !! nonpolar
0 0 0 0 polar - 15channel proteinsa protein that allows the transport of specific substances across a cell membrane
- 16cholesterolit helps the outer coating of the cell
- 17process of diffusionmolecules tend to spread and they don't need energy
- 18what is facilitated diffusion? what is the difference between diffusion and facilitated diffusiondiffusion: through the phospholipid bilayer and happens to small or non polar particles
facilitated diffusion: through the transport protein and happens to large or polar particles - 19concentration gradienta gradual change in the concentration of solutes in a solution as a function of distance through a solution. the gradual difference in the concentration of solutes in a solution between two regions. a gradient results from an unequal distribution of ions across the cell membrane. When this happens, solutes move along a concentration gradient. this movement is called diffusion.
- 20phagocytosis and pinocytosisphagocytosis: is the situation when it gets a solid
pinocytosis: the act of grabbing of liquid
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- FlashCards sobre Cell Transport 9th grade Biology Quiz, criado por Zainab Rizvi em 28-10-2014.
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- Zainab Rizvi
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