5 Written questions
5 Matching questions
- facilitated diffusion
- active transport
- a the transport of substances through a cell membrane along a concentration gradient with the aid of carrier proteins.
- b the bursting of a cell.
- c a cell that ingests and destroys (digests) foreign matter or microorganisms.
- d the process by which a cell membranes surrounds a particle and encloses the particle in a vesicle to bring the particle into the cell.
- e the movement of chemical substances, usually across the cell membrane, against a concentration gradient; requires cells to use energy.
5 Multiple choice questions
- in protists, an organelle that accumulates water and then releases it periodically to maintain osmotic pressure.
- a complex of protein molecules in a cell membrane that form a pore through which ions can pass.
- 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.
- describes a solution whose solute concentration is lower than the solute concentration inside a cell.
5 True/False questions
vesicle → 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.
isotonic → describes a solution whose solute concentration is lower than the solute concentration inside a cell.
pinocytosis → the process by which a cell membranes surrounds a particle and encloses the particle in a vesicle to bring the particle into the cell.
equilibrium → in biology, a state that exists when the concentration of a substance is the same throughout a space.
concentration gradient → a difference in the concentration of a substance across a distance.