The diagram below shows a cell with three different membrane transport proteins. The Na+/K+ Pump is a primary active transporter and the Na+/Waste Co-transporter is a secondary active transporter. Arrows show the direction of net movement of molecules through the Pump and Co-transporter. The Na+ Channel can exist in either a closed state (no Na+ can pass through) or an open state (Na+ can pass through). Use this diagram to answer the questions below. What will happen to the net movement of Waste molecules if the Na+/K+ Pump stops working?
a) Net movement of Waste out of the cell will continue indefinitely (nothing will change)
b) Net movement of Waste out of the cell will continue for some time and then Waste will be transported into the cell
c) All net movement of Waste in or out of the cell will stop immediately
d) Net movement of Waste out of the cell will stop immediately and then Waste will be transported into the cell
e) Net movement of Waste out of the cell will continue for some time and then all net movement of Waste in or out of the cell will stop
Ans: e) Net movement of Waste out of the cell will continue for some time and then all net movement of Waste in or out of the cell will stop
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