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What are gap junctions?

User Finswimmer
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Final answer:

Gap junctions are protein-lined pores that allow the passage of water and small molecules. They play an important role in cardiac muscle by facilitating the transmission of electrical signals for synchronized contraction.

Step-by-step explanation:

Gap junctions are protein-lined pores formed by connexins, which are proteins in the plasma membrane of adjacent animal cells. When the connexons align, they create a channel between the cells that allows the passage of water and small molecules, but not proteins or nucleic acids. Gap junctions play a crucial role in cardiac muscle, where they facilitate the efficient transmission of electrical signals for synchronized contraction.

User Iruediger
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