Which of the Following Statements About Gap Junctions is FALSE

Question

Which of the following statements about gap junctions is FALSE?
A)Gap junctions are made of connexons.
B)Molecules up to 1000 daltons in molecular mass can move across gap junctions.
C)Because gap junctions only allow uncharged molecules to pass through, they are not used for electrically coupling cells.
D)Gap junctions can close in response to extracellular signals.

Accepted Answer

This statement is false. Gap junctions allow charged molecules to pass through, including ions and second messengers. Gap junctions are commonly used for electrically coupling cells, such as in cardiac muscle cells.