Which of the following junctions allows the transfer of cardiac impulses from one fibre to another fibre?
A
Tight junctions
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B
Intercalated discs
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C
Adherens junctions
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D
Gap junctions
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Solution
The correct option is B Intercalated discs Intercalated discs are communication junctions which allows the transfer of cardiac impulses from one fibre to another fibre. These are present between adjacent cardiac muscle fibres.
Tight junctions stop substances from leaking across the tissue.
Adherens junction cement the neighbouring cells together.
Gap junctions facilitate cell communications by movement of ions and molecules between adjacent cells.
Plasmodesmata are intercellular cytoplasmic connections found in the case of plants. They are not found in animal cells.