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NEET UG BIOLOGY MCQ: STRUCTURAL ORGANISATION IN ANIMALS
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Read the following statements.
(i) It is a contractile tissue present only in the heart.
(ii) Cell junctions fuse the plasma membranes of these cells and make them stick together.
(iii) Communication juntions at some fusion points allow the cells to contract as a unit, i.e., when one cell receives a signal to contract, its neighbours are also stimulated to contract.
Which of the following type of tissue is being described by the above statements?
(i) It is a contractile tissue present only in the heart.
(ii) Cell junctions fuse the plasma membranes of these cells and make them stick together.
(iii) Communication juntions at some fusion points allow the cells to contract as a unit, i.e., when one cell receives a signal to contract, its neighbours are also stimulated to contract.
Which of the following type of tissue is being described by the above statements?
View answer and explanation
Correct option: B
Cardiac muscle
Option B (Cardiac muscle) is correct because the statements describe the characteristics of cardiac muscle: contractile tissue in the heart, cells fused by junctions, and communication junctions allowing coordinated contraction.
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ii) Smooth muscles are unbranched and cylindrical.
iii) Striated muscles can be branched or unbranched.
iv) Involuntary muscles are non-striated. The ciliated columnar epithelial cells in humans are known to occur in The outermost wall of spermatophore of cockroach is composed of the secretions of