Function of an Intercalated Disc in Cardiac Muscle Cells
What is the function of an intercalated disc?
Which option describes the function of an intercalated disc in cardiac muscle cells?
O Uses desmosomes to hold cells together
O Uses tight junctions to snap cells together for great tensile strength
O Contains both desmosomes for tensile strength and gap junctions for communication
O Contains gap junctions that allow rapid communication between cells
Answer
The function of an intercalated disc is to provide cell adhesion through desmosomes and enable rapid communication between cardiac muscle cells through gap junctions.
An intercalated disc is a specialized structure found in cardiac muscle cells. It serves multiple functions:
Cell adhesion: Intercalated discs use desmosomes to hold adjacent cells together. Desmosomes are cell junctions that provide mechanical strength and prevent the cells from separating during the contraction of the heart.
Communication: Intercalated discs contain gap junctions, which allow for rapid communication between cardiac muscle cells. Gap junctions are channels that connect the cytoplasm of adjacent cells, enabling the passage of ions and small molecules. This communication is essential for the coordinated contraction of the heart.
Overall, intercalated discs play a crucial role in maintaining the structural integrity of the heart and ensuring efficient communication between cardiac muscle cells.