Topic summary
Cellular antenna
Extracted from the Wikipedia article Cilium.
Most non-motile cilia, termed primary cilia or sensory cilia, serve solely as sensory organelles. Most vertebrate cell types possess a single non-motile primary cilium, which functions as a cellular antenna. Olfactory neurons possess a great many non-motile cilia. Non-motile cilia that have a central pair of microtubules are the kinocilia present on hair cells.