A type of transport protein found in the plasma membrane of cells lining the inside of the intestine allows sodium ions to diffuse down their concentration gradient.The ions move through the transport protein,and into the cell.These transport proteins will use the kinetic energy of the diffusing sodium ions to bring glucose into the cells as well.Which of the following would stop transport of glucose through this transport protein?

Question

Quizplus · Accepted Answer

The transport of sodium ions and glucose into the cell is dependent on the activity of the sodium-potassium pump. If the pump is stopped, the sodium ion concentration gradient necessary for the transport of glucose into the cell is disrupted, and glucose transport through this transport protein will stop. Increasing the number of digestive enzymes, increasing the concentration of glucose outside of the cell, or lowering the energy of activation would not directly affect the activity of the sodium-potassium pump or the transport of sodium ions and glucose through this transport protein.

A Type of Transport Protein Found in the Plasma Membrane