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STD 11 - 7. Structural organisation in animal — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 7. Structural organisation in animal1 Mark
MCQ
Intercalated discs are the communication junctions between the cells of
  • ✓
    cardiac muscles
  • B
    striped muscles
  • C
    adipose tissue
  • D
    nerve and striated muscles
✓

Answer

Correct option: A.
cardiac muscles
a
Cardiac muscles are involuntary, cross striated & non-fatigued fibres. Cell junctions fuse the plasma membranes of cardiac muscle cells and make them stick together. Communication junctions (intercalated discs) at some fusion points allow the cells to contract as a unit, i.e., when one cell receives a signal to contract, its neighbouring cells are also stimulated to contract.

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