5. State true (T) or false (F) for the following statements.
(a) The smooth muscles help in blinking of eyes.
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Explanation:
The orbicularis oculi muscle is innervated by cranial nerve VII (the facial nerve). Contraction of the palpebral portion closes the eyelid gently, and the palpebral orbicularis is the muscle of action in an involuntary blink and a voluntary wink; relaxation of the levator muscle follows.
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