Which muscle is striated in appearances but resembles smooth muscle in action?

The muscle that is striated in appearance but resembles smooth muscle in action is cardiac muscle. It displays striations similar to skeletal muscle due to the organized arrangement of myofibrils, yet it functions involuntarily like smooth muscle. Cardiac muscle cells are interconnected by intercalated discs, allowing for coordinated contractions that are essential for heart function. This unique combination allows the heart to contract rhythmically and efficiently.