- A Skeletal is voluntary and unbranched; cardiac is involuntary and branched with intercalated discs
- B Skeletal muscle contracts involuntarily while cardiac muscle remains under fully conscious control
- C Both share roughly identical branching patterns and identical nervous control mechanisms overall
- D Skeletal muscle fibres are largely restricted to the myocardium tissue of the heart itself
Correct answer: A. Skeletal is voluntary and unbranched; cardiac is involuntary and branched with intercalated discs
Explanation: Skeletal muscle is voluntary, multinucleate, and made of unbranched fibres. Cardiac muscle, though also striated, is involuntary, uninucleate, and made of branched fibres joined end-to-end by intercalated discs.
Concept context
The four basic animal tissue types (epithelial, connective, muscular, neural) and the cockroach as a model organism for organ-system level organisation.