A single cell within a culture of freshly isolated cardiac muscle cells is injected with a fluorescent dye that cannot cross cell membranes. Within minutes, several adjacent cells become fluorescent. The most likely explanation for this observation is the presence of
Correct Answer: Gap junctions
Description: Gap junctions are pores composed of paired connexons that allow the passage of ions, nucleotides, and other small molecules between cells. Ref: katzung 12 th ed.
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Pharmacology
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