Which of the following statements concerning gap junctions is CORRECT? A gap junction made up of a total of 2 connexons will

Question

Which of the following statements concerning gap junctions is CORRECT?
A gap junction made up of a total of 2 connexons will have a total of 6 connexins.
Gap junctions close to protect cells adjacent to a damaged cell.
Gap junctions allow the passage of ions and metabolites (less than 1000 Daltons)
both to and from the extracellular fluid.
Gap junctions allow the sharing of organellar membranes, such as in the case of the
smooth endoplasmic reticulum (SER).

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