The rate of diffusion increases if thea. concentration gradient decreases.b. temperature of a solution decreases.c. viscosity of a solution decreases.d. All of these are correct.
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The rate of diffusion increases if the
a. concentration gradient decreases.
b. temperature of a solution decreases.
c. viscosity of a solution decreases.
d. All of these are correct.
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- The principal force driving movement in diffusion is______. a. temperature b. particle size c. concentration gradient d. membrane surface area_______ is the net movement of substances from a high concentration to a low concentration medium, whereas the _______ is the net movement of water across a membrane. a. Diffusion- ultrafiltration b. Dialysis-osmosis c. Diffusion-osmosis d. Osmosis-diffusionWhether in a gas, a liquid, or a semisolid, diffusion always occurs a). at the same rate. b). from high to low solute concentration. c). faster at lower temperaturesd). from low to high solute concentration.
- The diffusion of water across a selectively permeable membrane is called? A. Active transport B. Facilitated diffusion C. Osmosis D. Cell membraneSelect the best option: In diffusion, substances move from areas of (greater) (lesser) to (greater) lesser concentrations.Which of these statements about carrier-mediated facilitated diffusion is true? a. It uses cellular ATP. b. It is used for cellular uptake of blood glucose. c. It is a form of active transport. d. None of these are true.
- The diffusion of substances within a solution tends to move those substances ________ their ________ gradient. a) up; electrical b) up; electrochemical c) down; pressure d) down; concentrationa. What concept pertains to the movement of particles across the cell membrane? A. Diffusion B. Active transport C. Facilitated diffusion b. Which respiration which happened between the blood and body tissue? A. Internal respiration B. External Respiration C. Both a and bWhen a semipermeable sac filled with a solution containing 10% glucose is immersed in water, the fluid volume in the sac increases. What would happen if the sac solution was replaced with a 20% glucose solution? Group of answer choices A) sac would gain more fluid B) sac would gain the same amount of fluid C) no effect D) sac would lose fluid
- In terms of their effect on the rate of diffusion, which of the following is the odd one out? a) decreasing the surface area of the membrane b) decreasing membrane permeability c) decreasing lipid solubility of the diffusing molecule d) decreasing the concentration gradient of the diffusing molecule e) decreasing the thickness of the membraneAn increase in temperature will cause an increase in diffusion in diffusion rate becausea. hot water changes to a solid, so diffusion is easier.b. the frequency and force of molecular collisions decreases.c. hot molecules get smaller and theseforce diffuse faster.d. the frequency and force of molecular collisions increases.Oxygen and carbon dioxide are exchanged in the lungs and through all cell membranes diffusion down gradients of a. concentration b. tempertaure c. partial pressure d. ionic potential e. osmolarity
