NEETZoologyStructural Organisation in Animals
Select the option that correctly identifies the tissue shown in the diagram and matches it with either its characteristics or its location
Options
- AVoluntary muscle fibres, show branching and are found in the walls of the heart
- BVoluntary muscle fibres, show tapering at both ends and are attached with the bones of ribs
- CInvoluntary muscle fibres, branched and intercalated discs are present
- DInvoluntary muscle fibres that are spindle shaped and unbranched
Correct answer
C. Involuntary muscle fibres, branched and intercalated discs are present
Step-by-step solution
As the name suggests, Cardiac muscles are the muscles of heart. Many cardiac muscle cells assemble in a branching pattern to form a cardiac muscle. Based on appearance, cardiac muscles are striated. They are involuntary in nature as the nervous system does not control their activities directly. 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 rec