5 Written questions
5 Matching questions
- ion channel
- facilitated diffusion
- a the process by which a cell engulfs large particles or whole cells, either as a defense mechanism or as a means to obtain food.
- b a complex of protein molecules in a cell membrane that form a pore through which ions can pass.
- c the transport of substances through a cell membrane along a concentration gradient with the aid of carrier proteins.
- d describes a solution whose solute concentration is lower than the solute concentration inside a 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
- the bursting of a cell.
- a protein that transports substances across a cell membrane.
- 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.
- in protists, an organelle that accumulates water and then releases it periodically to maintain osmotic pressure.
- 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.
5 True/False questions
active transport → the movement of chemical substances, usually across the cell membrane, against a concentration gradient; requires cells to use energy.
concentration gradient → in protists, an organelle that accumulates water and then releases it periodically to maintain osmotic pressure.
diffusion → the movement of particles from regions of higher density to regions of lower density.
turgor pressure → the pressure that is exerted on the inside of cell walls and that is caused by the movement of water into the cell.
endocytosis → 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.