5 Written questions
5 Matching questions
- passive transport
- contractile vacuole
- facilitated diffusion
- a in protists, an organelle that accumulates water and then releases it periodically to maintain osmotic pressure.
- b the process by which a cell membranes surrounds a particle and encloses the particle in a vesicle to bring the particle into the cell.
- c the transport of substances through a cell membrane along a concentration gradient with the aid of carrier proteins.
- d the bursting of a cell.
- e the movement of substances across a cell membrane without the use of energy by the cell.
5 Multiple choice questions
- a carrier protein that uses ATP to actively transport sodium ions out of a cell and potassium ions into the 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 diffusion of water or another solvent from a more dilute solution (of a solute) to a more concentrated (of the solute) through a membrane that is permeable to the solvent.
- a complex of protein molecules in a cell membrane that form a pore through which ions can pass.
- describes a solution whose concentration is equal to the solute concentration inside a cell.
5 True/False questions
phagocytosis → a method of active transport across the cell membrane in which the cell takes in extracellular fluids.
hypertonic → describes a solution whose solute concentration is lower than the solute concentration inside a cell.
equilibrium → in biology, a state that exists when the concentration of a substance is the same throughout a space.
pinocytosis → 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.
vesicle → a cell that ingests and destroys (digests) foreign matter or microorganisms.