Read the following statements (i - iv) and accordingly mark the option...
Smooth muscles are not branched and cylindrical in appearance. Involuntary muscles are striated.
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Read the following statements (i - iv) and accordingly mark the option...
Answer should be (c) 3 and 4 as smooth muscles are tapered and cardiac muscle is not coencyte
Read the following statements (i - iv) and accordingly mark the option...
Cardiac fibres are branched with one or more nuclei.
Smooth muscles are unbranched and cylindrical.
Striated muscles can be branched or unbranched.
Involuntary muscles are non-striated.
To determine the correct option that has both correct statements, let's analyze each statement individually:
(i) Cardiac fibres are branched with one or more nuclei.
This statement is correct. Cardiac muscle fibers, also known as myocardial cells, are branched and interconnected in a network-like structure. They contain one or more nuclei, which are responsible for the synthesis of proteins and other cellular components.
(ii) Smooth muscles are unbranched and cylindrical.
This statement is incorrect. Smooth muscles are not unbranched and cylindrical. Instead, they are spindle-shaped and have a single nucleus. They lack the striations present in skeletal and cardiac muscles, which gives them a smooth appearance under a microscope. Smooth muscles are found in the walls of hollow organs such as the stomach, intestines, and blood vessels.
(iii) Striated muscles can be branched or unbranched.
This statement is correct. Striated muscles, also known as skeletal muscles, are attached to bones and are responsible for voluntary movements. They are long, cylindrical fibers that can be branched or unbranched. Each skeletal muscle fiber contains multiple nuclei located at the periphery of the cell.
(iv) Involuntary muscles are non-striated.
This statement is correct. Involuntary muscles, also known as smooth muscles, are not striated. They lack the organized pattern of sarcomeres seen in striated muscles. Involuntary muscles are controlled by the autonomic nervous system and are found in various organs and structures such as the digestive system, blood vessels, and respiratory system.
Based on the analysis of each statement, the correct option that has both correct statements is (d) (i) and (iii).
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