Differentiate the following: simple diffusion; facilitated diffusion Facilitated diffusion, active transport Endocytosis; exocytosis(in terms of purpose, substance transported, direction of motion of the vesicle) Bulk flow; cytoplasmic streaming
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Differentiate the following:
- simple diffusion; facilitated diffusion
- Facilitated diffusion, active transport
- Endocytosis; exocytosis(in terms of purpose, substance transported, direction of motion of the vesicle)
- Bulk flow; cytoplasmic streaming
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- Crossing a cell membrane by simple diffusion can be distinguished from facilitated diffusion by which of the following: Select all that apply. Simple diffusion moves molecules down a concentration gradient while facilitated diffusion moves molecules up a concentration gradient Simple diffusion does not require membrane proteins; facilitated diffusion requires specific membrane proteins Simple diffusion does not require energy; facilitated diffusion requires energy Simple diffusion is not saturable; facilitated diffusion rates are limited by the number of functional membrane proteins and can be saturatedWhich of the following are features of facilitated diffusion? There may be more than one correct answer, select all that apply. Requires energy Movement assisted by proteins Can include passive diffusion Depends on ATP hydrolysis Can include ion transport down its concentration gradient in a cell (high to low concentration)Define and provide an example for each of the following: simple diffusion, facilitated diffusion, osmosis, passive transport and active transport.
- Classify each phrase based on whether it describes or gives an example of passive transport, facilitated diffusion, both processes, or neither. Passive transport glucose transport across a membrane Facilitated diffusion cholesterol transport across a membrane protein-assisted movement. Answer Bank Both movement to an area of lower concentration. movement across a membrane Neither requires an input of energyFacilitated diffusion differs from active transport in that facilitated diffusion transports against a concentration gradient while active transport does not facilitated diffusion requires expenditure of energy while active transport does not active transport requires expenditure of energy while facilitated diffusion does not facilitated diffusion involves carrier proteins while active transport does not facilitated diffusion works against a concentration gradient while active transport works only with the concentration gradientDifferentiate between active transport and passive (simple) diffusion. (At least 4 differences)
- Diffusion requires a membrane to occur. True FalseDefine: simple diffusion, facilitated diffusion, primary active transport, secondary active transport and cotransport (by sure to address symport and antiport) .Compare and contrast the following methods of a passing cell membrane in terms of movement with respect to the concentration gradient, use of ATP, and the use of transporters with examples. (Simple) Diffusion Facilitated Diffusion/Passive Transport Osmosis Active Transport Exocytosis Endocytosis (with its 3 subforms)
- Compare and contrast simple diffusion, facilitated diffusion, and osmosis relative to substances transported, direction, and mechanism.Define and give examples of the processes: diffusion and active transport.Identify whether each method of membrane transport is passive or active by dragging the label to the correct box