BCHM 210 Study Guide - Midterm Guide: Atp Hydrolysis, Active Transport, Symporter
Document Summary
And then atp hydrolysis to adp resets the system. Antiporters vs. symporters: sodium calcium exchanger is a antiporter that transports 3 na+ ions into the. Complements ca++ atpase in that it has a lower affinity but higher capacity for ca++. Na+ (antiporters), two substrates in the same direction (symporters): glucose is pumped into some cells by a symporter powered by the entry of. Secondary transporters can transport two substrates in opposite directions. Antiporter - antiporters couple the downhill flow of one species to the uphill flow of another in the opposite direction across the membrane. Symporter - symporters use the flow of one species to drive the flow of a different species in the same direction across the membrane. It then everts (6) to complete the cycle. This works because the hydrogen concentration outside the cell is greater than inside the cell; so this symporter using the h+ gradient to transport lactose into the cell.
