How does a gap junction facilitate intercellular communication?

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Solution

Definition:

Gap junctions are channels that connect the plasma membrane of adjacent epithelial cells. These gap junctions are made up of 6 membrane proteins called connexins that form connections with adjacent connexins forming a channel.

Role in cell communication:

The gap junction channel connects the cytoplasm of the cells and helps in the transfer of ions and some small molecules. Example- The ions pass through the gap junctions of the heart muscle cells bringing out rapid contraction of the muscle cells.

Diagram:

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Similar questions

Column I	Column II
A. Tight junctions	i. Cement neighbouring cells together to form a sheet
B. Adhering junctions	ii. Extracellular matrix supporting the epithelial cells
C. Gap junction	iii. Establish a barrier to prevent leakage of fluid across epithelial cells
D. Basement membrane	iv. Cytoplasmic channels to facilitate to communication between adjacent cells

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