NEET 2026
- Exam
- NEET
- Year
- 2026
- Subject
- Biology
- Chapter
- Chapter
NEET 2026 · Biology · Chapter
Observe the given diagrammatic representation of a specific muscle...
Observe the given diagrammatic representation of a specific muscle tissue. Identify the structure labeled 'X' and select the option that correctly pairs it with the primary location of this tissue in the human body.
Options
- AX = Tight junction ; Location = Inner lining of stomach
- BX = Neuromuscular junction ; Location = Attached to skeletal bones
- CX = Intercalated disc ; Location = Wall of the heart
- DX = Z-line ; Location = Walls of blood vessels
Correct answer
C. X = Intercalated disc ; Location = Wall of the heart
Step-by-step solution
Based on the diagrammatic representation, the muscle tissue shown has branched fibers, striations, and single, centrally located nuclei. These features are characteristic of cardiac muscle tissue.
The structure labeled 'X' points to the dark, zig-zag bands connecting adjacent cardiac muscle cells. These are known as intercalated discs, which are specialized cell junctions containing desmosomes and gap junctions that allow the cardiac muscle cells to contract as a single functional unit.
Cardiac muscle tissue is exclusively found in the wall of the heart (myocardium).
Therefore, X is an intercalated disc, and its primary location is the wall of the heart.
Answer: X = Intercalated disc ; Location = Wall of the heart
The structure labeled 'X' points to the dark, zig-zag bands connecting adjacent cardiac muscle cells. These are known as intercalated discs, which are specialized cell junctions containing desmosomes and gap junctions that allow the cardiac muscle cells to contract as a single functional unit.
Cardiac muscle tissue is exclusively found in the wall of the heart (myocardium).
Therefore, X is an intercalated disc, and its primary location is the wall of the heart.
Answer: X = Intercalated disc ; Location = Wall of the heart