Multiple Choice
Which of the following is not a cell cell junction?
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18. Cell Junctions and Tissues
Cell-Cell Junctions
Multiple Choice
In the context of cell-cell junctions, what is the name of the specialized junction at which a neuron meets another cell to transmit signals?
A
Desmosome (macula adherens)
B
Synapse
C
Gap junction
D
Tight junction (zonula occludens)
Verified step by step guidance1
Understand that cell-cell junctions are specialized structures that connect cells and facilitate communication or adhesion.
Recognize that desmosomes (macula adherens) are junctions that provide strong adhesion between cells, especially in tissues subject to mechanical stress, but they do not transmit signals.
Know that gap junctions allow direct cytoplasmic exchange of ions and small molecules between adjacent cells, enabling electrical and metabolic coupling, but they are not the primary site for neuron-to-cell signal transmission.
Identify tight junctions (zonula occludens) as junctions that create a seal between epithelial cells to prevent leakage of molecules, not involved in neuronal signaling.
Recall that the specialized junction where a neuron meets another cell to transmit signals is called a synapse, which allows the transfer of electrical or chemical signals from one cell to another.
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