1. Active transport is always driven by the hydrolysis of high-energy phosphate bonds.( )
2. Treatment of an animal cell with an inhibitor that is specific for the Na+/K+ pump is not likely to affect the uptake of glucose by sodium cotransport.( )
3. Tight junctions get their name from their property of holding cells togetherso tightly that they cannot be separated by mechanical forces.( )
4. Gap junctions connect the cytoskeletal elements of one cell to a neighboring cell or to the extracellular matrix.( )
5. NO acts only locally because it has a short half-life--about 5 to 10 seconds--in the extracellular space before it is converted to nitrates and nitrites by oxygen and water.( )