5 Written questions
5 Matching questions
- active transport
- facilitated diffusion
- concentration gradient
- a a difference in the concentration of a substance across a distance.
- b describes a solution whose concentration is equal to the solute concentration inside a cell.
- c the transport of substances through a cell membrane along a concentration gradient with the aid of carrier proteins.
- d the movement of chemical substances, usually across the cell membrane, against a concentration gradient; requires cells to use energy.
- e a cell that ingests and destroys (digests) foreign matter or microorganisms.
5 Multiple choice questions
- 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.
- a carrier protein that uses ATP to actively transport sodium ions out of a cell and potassium ions 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.
- 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.
- in biology, a state that exists when the concentration of a substance is the same throughout a space.
5 True/False questions
contractile vacuole → in protists, an organelle that accumulates water and then releases it periodically to maintain osmotic pressure.
vesicle → a small cavity or sac that contains materials in a eukaryotic cell; forms when part of the cell membrane surrounds the materials to be taken into the cell or transported within the cell.
carrier protein → describes a solution whose solute concentration is higher than the solute concentration inside a cell.
hypertonic → describes a solution whose solute concentration is lower than the solute concentration inside a cell.
cytolysis → 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.