Gap junctions transverse the gap between plasma membranes of two cells by means of
A) plasmodesmata.
B) desmosomes.
C) connexons.
D) cyclic AMP.
E) direct transduction.

Question

Quizplus · Accepted Answer

Gap junctions are formed by the connection of two connexons (one from each cell) which extend across the extracellular space and form channels that allow small molecules and ions to pass between adjacent cells. Plasmodesmata are plant-specific structures that also allow for communication between adjacent cells, but they are different in structure and function. Desmosomes are structures that anchor cells together, but they do not allow for communication between cells. Cyclic AMP is a second messenger in cell signaling pathways and is not involved in the formation of gap junctions. Direct transduction is not a known mechanism for the formation of gap junctions.

Gap Junctions Transverse the Gap Between Plasma Membranes of Two