Which of the following will increase the flux of a substance across a plasma mem

Question

Which of the following will increase the flux of a substance across a plasma membrane ( can cross the membrane by diffusion). A. Increasing the concentration gradient of the substance across the membrane B. Increasing the membrane surface area Increasing the temperature All of the above None of the above D 8. A solution that has a high osmolarity would contain A High solute concentration and a high water concentration High solute concentration and a low water concentration Low solute concentration and a high water concentration D. Low solute concentration and a low water concentration E. None of the above 9. In order for osmosis to produce a change in cell volume, which of the following must occur The membrane must be permeable to water and solute The membrane must be permeable to water but effectively impermeable to solute There must be a difference in the osmolarity of the solutions on the two sides of the membrane A. C E. A and C B and C 10. Active transport Utilizes energy Can not transport molecules against a concentration gradient C. Can not be saturated D. Requires cofactors. E. Aand C 11. Bulk transport includes A. Osmosis Primary active transport. Pinocytosis D. Simple diffusion. E. A and D 12. The Na+/K+ pump A. Establishes equilibrium concentrations of sodium and potassium ions B. Is an electrogenic pump. C. Is an example of secondary active transport. D. Interferes with glucose transport. All of the above 13. Which of the following statements about facilitated diffusion is TRUE? A. Movement is from high concentration to low concentration B. Facilitated diffusion can reach transport maximum (saturation) C. Facilitated diffusion is specific in terms of transporters Facilitated diffusion will still occur in the presence of cyanide E)All of the above statements are true

Explanation / Answer

7 & 8 are correct.

9. the answer should be E.

As there should be difference in the osmolarity and membrane should be permeable to water the only the water will get inside and increase the volume of the cell.

10. A.

As it transports particles from their lower concentration to higher concentration and it is against the concentration gradient. It is a saturable process.

11. correct

12. correct

13. correct

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