Multiple Choice
Which of the following is not a type of cell adhesion molecules?
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18. Cell Junctions and Tissues
Cell-Cell Adhesion
Multiple Choice
In the context of cell-cell adhesion, which molecules are primarily involved in cell-to-cell recognition and specific binding between neighboring animal cells?
A
Voltage-gated sodium channels concentrated in the axon initial segment
B
Cell adhesion molecules (CAMs), such as cadherins and selectins, on the cell surface
C
Ribosomal subunits that mediate mRNA translation in the cytosol
D
Aquaporins that facilitate passive water transport across membranes
Verified step by step guidance1
Understand that cell-cell adhesion involves specific molecules on the surfaces of neighboring cells that recognize and bind to each other to maintain tissue structure and communication.
Identify the types of molecules that mediate this adhesion; these are known as Cell Adhesion Molecules (CAMs), which include families such as cadherins and selectins.
Recognize that cadherins are calcium-dependent adhesion proteins that primarily mediate homophilic binding (binding to the same type of cadherin) between animal cells, playing a key role in maintaining tissue integrity.
Note that selectins are another class of CAMs involved in transient cell-cell interactions, especially in the immune system, facilitating the binding of leukocytes to endothelial cells.
Exclude other options like voltage-gated sodium channels (involved in electrical signaling), ribosomal subunits (involved in protein synthesis), and aquaporins (involved in water transport), as they do not participate in cell-cell recognition or adhesion.
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