In regards to hair cells involved in vertebrate hearing organs, we know that
A) Stereocilia are connected to each other by small fibers.
B) Mechanosensitive ion channels at the tips of stereocilia are all closed at rest.
C) The 9 + 2 arrangement of stereocilia allow for free bending to improve sound resolution.
D) Their bending always causes an increase in firing in the primary afferent.
Answer: A
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