Multiple choice general knowledge science & technology

Which muscle causes blinking?

  1. The depressor labii inferiors

  2. The obicularis oris

  3. The thyroid cartilage

  4. The obicularis oculi
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D Correct answer
Explanation

The orbicularis oculi muscle is responsible for closing the eyelid during blinking. This circular muscle surrounds the eye and contracts to close the eye. The other options are incorrect: depressor labii inferioris is for lower lip depression, orbicularis oris is for lip movement, thyroid cartilage forms the Adam's apple structure (not a muscle for blinking).

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