At each end of a cardiac muscle fiber are plates of desmosomes and gap junctions that connect the fibers together and allow them to communicate with each other. These structures are called:
A. striations
B. sarcoplasmic reticulum
C. intercalated discs
D. Purkinje fibers
Answer (2)
The structures at each end of cardiac muscle fibers are called intercalated discs , consisting of desmosomes and gap junctions that connect the fibers and allow communication. They provide mechanical strength and facilitate electrical signaling between muscle fibers. Other terms provided are related to muscle function but do not refer to these specific structures. ;
The structures at the ends of cardiac muscle fibers are called intercalated discs, which consist of desmosomes and gap junctions. These components allow the fibers to connect and communicate effectively, playing a crucial role in heart function. The correct answer is C. intercalated discs.
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