5 Written Questions
5 Matching Questions
- passive transport
- a in biology, a state that exists when the concentration of a substance is the same throughout a space.
- b the bursting of a cell.
- c the process by which a cell membranes surrounds a particle and encloses the particle in a vesicle to bring the particle into the cell.
- d the movement of substances across a cell membrane without the use of energy by the cell.
- e the process by which a substance is released from the cell through a vesicle that transports the substance to the cell surface and then fuses with the membrane to let the substance out.
5 Multiple Choice Questions
- describes a solution whose concentration is equal to the solute concentration inside a cell.
- the pressure that is exerted on the inside of cell walls and that is caused by the movement of water into the cell.
- the contraction or shrinking of the cell membrane of a plant cell in a hypertonic solution in response to the loss of water by osmosis.
- a protein that transports substances across a cell membrane.
- describes a solution whose solute concentration is higher than the solute concentration inside a cell.
5 True/False Questions
ion channel → describes a solution whose concentration is equal to the solute concentration inside a cell.
concentration gradient → a difference in the concentration of a substance across a distance.
pinocytosis → a method of active transport across the cell membrane in which the cell takes in extracellular fluids.
sodium-potassium pump → a carrier protein that uses ATP to actively transport sodium ions out of a cell and potassium ions into the cell.
contractile vacuole → in protists, an organelle that accumulates water and then releases it periodically to maintain osmotic pressure.