Which of the following processes requires protein carriers to move materials up their concentration gradient? ____ a. active transport ____ b. osmosis ____ c. endocytosis ____ d. facilitated diffusion

Imagine a cell can perform exocytosis, but only minimalendocytosis. What would happen to the cell?a. The cell would secrete all its intracellular proteins.b. The plasma membrane would increase in size overtime.c. The cell would stop expressing integral receptorproteins in its plasma membrane.d. The cell would lyse.

Statement 1: The direction of diffusion of a solute across a membrane is determined by its concentration gradient and always moves toward equilibrium. Statement 2: In passive transport, solutes move down the gradient from a region of low concentration to a region of high concentration. A Both statements are true. Both statements are false. C) Statement 1 is true. Statement 2 is false. Statement 1 is false. Statement 2 is true.

Which of the following best describes an Isotonic solution? A. The cellular plasma membrane will expand when the cell is place into an isotonic solution. B. The cellular plasma membrance will shrink when the cell is placed into an isotonic solution. C. Solute concentrations in the solutions are equal acorss the cellular plasma membrane. D. Solvent concentrations cause unequal solution concentrations across the plasma membrane.