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Question
In cardiac muscles, certain structure allows the cells to contract as a unit and is known as
In cardiac muscles, certain structure allows the cells to contract as a unit and is known as
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Solution
The correct option is D Intercalated disc
Intercalated discs are microscopic structures of cardiac muscle. They occur at the Z-line of the sarcomere and are made of fascia adherens, desmosomes and gap junctions. They are cross bands that separate the opposite ends of myocytes. These discs hold the adjacent cells together and allow diffusion of ions across the cells due to which muscle impulses travel rapidly from cell to cell leading to their contraction. Thus the correct answer is option D.
Intercalated discs are microscopic structures of cardiac muscle. They occur at the Z-line of the sarcomere and are made of fascia adherens, desmosomes and gap junctions. They are cross bands that separate the opposite ends of myocytes. These discs hold the adjacent cells together and allow diffusion of ions across the cells due to which muscle impulses travel rapidly from cell to cell leading to their contraction. Thus the correct answer is option D.
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