The sensory receptors in the vestibular system are hair cells with which projections?

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Prepare for the Vestibular System Test with interactive questions and detailed explanations. Boost your understanding of the vestibular system effectively and increase your chances of passing with flying colors!

Multiple Choice

The sensory receptors in the vestibular system are hair cells with which projections?

Explanation:
Hair cells in the vestibular system have two kinds of apical projections: a bundle of stereocilia and a single kinocilium. Stereocilia are actin-based microvilli arranged in a stepped bundle, and the kinocilium is a true cilium. Deflection of the bundle toward the kinocilium increases depolarization by opening mechanosensitive channels, while movement away decreases it. This combination of stereocilia plus kinocilium is what enables vestibular hair cells to transduce head movements into neural signals. Choices that mention only general cilia, microvilli alone, or flagella don’t capture this specific pairing.

Hair cells in the vestibular system have two kinds of apical projections: a bundle of stereocilia and a single kinocilium. Stereocilia are actin-based microvilli arranged in a stepped bundle, and the kinocilium is a true cilium. Deflection of the bundle toward the kinocilium increases depolarization by opening mechanosensitive channels, while movement away decreases it. This combination of stereocilia plus kinocilium is what enables vestibular hair cells to transduce head movements into neural signals. Choices that mention only general cilia, microvilli alone, or flagella don’t capture this specific pairing.

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