Read the following statements regarding the structure of skeletal muscle fibres: A. Each muscle fibre is a syncytium as the sarcoplasm contains many nuclei. B. The light bands contain myosin and are called Isotropic bands, whereas the dark bands contain actin. C. The central part of the thick filament, not overlapped by thin filaments, is called the H zone. D. A thin fibrous membrane called the Z line holds the thick

Step-by-step solution

Statement A is correct. Skeletal muscle fibres are multinucleated, making them a syncytium, as the sarcoplasm contains many nuclei. Statement B is incorrect. The light bands contain actin and are called Isotropic (I) bands, whereas the dark bands contain myosin and are called Anisotropic (A) bands. Statement C is correct. The central part of the thick filament, which is not overlapped by thin filaments, is called the H zone. Statement D is incorrect. A thin fibrous membrane called the M line holds the thick filamen