5 Written questions
5 Matching questions
- ion channel
- a a complex of protein molecules in a cell membrane that form a pore through which ions can pass.
- b 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.
- c 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.
- d the bursting of a cell.
- e a method of active transport across the cell membrane in which the cell takes in extracellular fluids.
5 Multiple choice questions
- describes a solution whose solute concentration is higher than 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 movement of chemical substances, usually across the cell membrane, against a concentration gradient; requires cells to use energy.
- the process by which a cell membranes surrounds a particle and encloses the particle in a vesicle to bring the particle into the cell.
- a cell that ingests and destroys (digests) foreign matter or microorganisms.
5 True/False questions
diffusion → the movement of particles from regions of higher density to regions of lower density.
carrier protein → the pressure that is exerted on the inside of cell walls and that is caused by the movement of water into the cell.
passive transport → the movement of chemical substances, usually across the cell membrane, against a concentration gradient; requires cells to use energy.
contractile vacuole → in protists, an organelle that accumulates water and then releases it periodically to maintain osmotic pressure.
phagocytosis → the process by which a cell engulfs large particles or whole cells, either as a defense mechanism or as a means to obtain food.