#Question id: 2069
#Unit 2. Cellular Organization
Which of the following processes includes all of the others?
#Question id: 2070
#Unit 2. Cellular Organization
The sodium-potassium pump is called an electrogenic pump because it:
#Question id: 2071
#Unit 2. Cellular Organization
Diffusion of ions across membranes through specific ion channels is driven by:
#Question id: 2072
#Unit 2. Cellular Organization
Which of the following structures would decrease the electrochemical gradient across a membrane?
#Question id: 2073
#Unit 2. Cellular Organization
The phosphate transport system in bacteria imports phosphate into the cell even when the concentration of phosphate outside the cell is much lower than the cytoplasmic phosphate concentration. Phosphate import depends on a pH gradient across the membrane—more acidic outside the cell than inside the cell. In this bacterial cell, phosphate transport is an example of:
#Question id: 2074
#Unit 2. Cellular Organization
In some cells, there are many ion electrochemical gradients across the plasma membrane even though there are usually only one or two proton pumps present in the membrane. The gradients of the other ions are most likely accounted for by: