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21 Cards in this Set
- Front
- Back
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simple diffusion is driven by what kind of energy
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kinetic
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what kind of substances move by simple diffusion
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fats, oxygen, carbon dioxide
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how do substances move into a cell by facilitated diffusion
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by carrier protein or or a membrane channel
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How does water move into the cell
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by osmosis or aquaporins or filtration
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what kinds of substances move into the cell through facilitated diffusion
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ions, glucose
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how many kinds of active transport are there
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three, primary active transport, and secondary active transport, and vesicular transport
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what are the four types of passive processes
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filtration, simple diffusion, faciliated diffusion, osmosis
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what kinds of things will just diffuse into the cell
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if its lipid soluble, small enough, or can be assisted by a carrier molecule
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what kinds of things are carried with facilitated diffusion
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glucose, sugars, amino acids, and ions
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can channels transport ions
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yes, and water too
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substances that are transported by facilitated diffusion are going against concentration gradient
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false, moving along it
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the cell's tendency to resist further net water entry
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osmotic pressure
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diffusion of a solvent through a selectively permeable membrane
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osmosis
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In the sodium potassium pump, are both ions moved by their concentration gradient
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yes, Na and K are both moved against
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what concentration is higher in the cell that of potassium or that of sodium
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potassium
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in what kinds of cells are you likely to find alot of sodium and potassium pumps
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muscle and nerve cells
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what happens with the sodium potassium pump
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potassium leaks out naturally and sodium leaks in naturally, so the body tries to get potassium back in and sodium back out with the pump
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explain secondary active transport
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well its like you are indirectly driving other stuff to come into the cell against its concentration gradient (water going down a hill to power a generator)
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why use vesicular transport
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to transport large things like fluids, macro molecules, and large particles into and out of the cell, moving stuff within the cells (vesicular trafficking)
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vesicular transport uses what form of energy
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ATP
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what kind of functions is exocytosis useful for
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mucous secretion, hormone secretion, ejection of wastes
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