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What type of muscle is smooth muscle?

  1. Cardiac muscle

  2. Involuntary muscle without striations

  3. Skeletal muscle with striations

  4. Voluntary muscle without striations

The correct answer is: Involuntary muscle without striations

Smooth muscle is a type of muscle that is involuntary and does not contain striations. This means that it is not primarily found in the heart (cardiac muscle), which is a different type of muscle called striated muscle. It also differs from skeletal muscle (C) which has voluntary control and a striped or striated appearance. Smooth muscle is typically found in the walls of various organs and blood vessels, where it contributes to involuntary movements.