Which reflex is stimulated by touching the lips?

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Multiple Choice

Which reflex is stimulated by touching the lips?

Explanation:
Touch on the lips triggers the sucking reflex, a natural mouth‑motion that leads to rhythmic sucking to obtain nourishment. This reflex appears at birth and supports breastfeeding or bottle feeding. While touching near the mouth can also invoke rooting—where the infant turns toward the stimulus and opens the mouth—the action most directly produced by lip touch is sucking. The other reflexes here are unrelated to lip contact: startle responds to sudden stimuli, and the grip reflex involves the hands.

Touch on the lips triggers the sucking reflex, a natural mouth‑motion that leads to rhythmic sucking to obtain nourishment. This reflex appears at birth and supports breastfeeding or bottle feeding. While touching near the mouth can also invoke rooting—where the infant turns toward the stimulus and opens the mouth—the action most directly produced by lip touch is sucking. The other reflexes here are unrelated to lip contact: startle responds to sudden stimuli, and the grip reflex involves the hands.

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