5 Written Questions
5 Matching Questions
- carrier protein
- ion channel
- concentration gradient
- a the movement of particles from regions of higher density to regions of lower density.
- b a complex of protein molecules in a cell membrane that form a pore through which ions can pass.
- c a protein that transports substances across a cell membrane.
- d a method of active transport across the cell membrane in which the cell takes in extracellular fluids.
- e a difference in the concentration of a substance across a distance.
5 Multiple Choice Questions
- a cell that ingests and destroys (digests) foreign matter or microorganisms.
- the process by which a cell engulfs large particles or whole cells, either as a defense mechanism or as a means to obtain food.
- the transport of substances through a cell membrane along a concentration gradient with the aid of carrier proteins.
- the process by which a cell membranes surrounds a particle and encloses the particle in a vesicle to bring the particle into the cell.
- describes a solution whose concentration is equal to the solute concentration inside a cell.
5 True/False Questions
vesicle → a cell that ingests and destroys (digests) foreign matter or microorganisms.
plasmolysis → 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.
exocytosis → 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.
passive transport → the movement of chemical substances, usually across the cell membrane, against a concentration gradient; requires cells to use energy.
sodium-potassium pump → 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.