Which of the Following Statements Concerning Gap Junctions Is Incorrect

question 59

Multiple Choice

Which of the following statements concerning gap junctions is incorrect?

• A) gap junctions are communicating junctions.
• B) at a gap junction, filaments of unknown composition extend between the plasma membranes of two closely adjacent but not touching cells, acting as "spot rivets" to anchor the cells together.
• C) gap junctions are formed by small connecting tunnels that link two adjacent cells and permit exchange of small water-soluble particles between the cells.
• D) gap junctions play an important role in transmission of electrical activity throughout an entire muscle mass.
• E) connexons are an important structural component of gap junctions.

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