Question

which muscle cell type has visible striations but is not under voluntary control? view available hint(s) cardiac smooth skeletal

Explanation:

1. Recall muscle cell types: Skeletal muscle is striated and voluntary. Smooth muscle is non - striated and involuntary. Cardiac muscle is striated (due to the arrangement of actin and myosin filaments) and involuntary (it contracts rhythmically without conscious control, regulated by the heart's internal pacemaker and autonomic nervous system).
2. Match the characteristics: The question asks for a muscle cell type with visible striations (so not smooth) and not under voluntary control (so not skeletal). Cardiac muscle fits this description.

Answer:

cardiac