Final answer:
In the context of galvanic cells, 'closing pores' is not an accurate term, as galvanic cells operate based on redox reactions at the electrodes to generate electricity. Electroporation is a biological technique unrelated to the operation of galvanic cells.
Step-by-step explanation:
To close the pores with the galvanic current, you would typically use the opposite of electroporation, which might involve using the current to facilitate the resealing of the cell membrane. However, this specific process isn't standard in galvanic cells, which are chemical cells used to generate electrical current through redox reactions. In typical galvanic cells, like those described in the question, a reduction reaction occurs at the cathode and an oxidation reaction occurs at the anode.
For instance, Figure 20.3.3a describes assembling a galvanic cell with copper and zinc electrodes. The two electrodes are connected by a wire and a salt bridge completes the circuit, allowing ions to move without the solutions mixing. When the circuit is closed, a redox reaction occurs, and the copper acts as the cathode while the zinc acts as the anode.
Electroporation, mentioned in Figure 12.9, is a different process used in molecular biology, particularly to introduce DNA into cells. It involves applying an electric pulse that momentarily disrupts the cell membrane, forming pores through which substances like DNA can enter. This process is not meant to be reversed by direct application of galvanic current.