Round 5: Tossup 1

This faculty is thought to influence mate selection by allowing the detection of differing major histocompatibility complex genes. This faculty’s “swipe card” model is based on molecular vibrations, (15[1])in contrast to its “lock and key” model based on molecular docking. Though it doesn't involve the eye, this faculty is mediated by rhodopsin-like (“roh-DOP-sin like”) receptors in the (*) cilia (10[1])(“SILL-ee-uh”) of namesake receptor neurons. This faculty is processed by a namesake “bulb” in the forebrain, and it is controversial (10[1])whether humans can communicate using it by secreting pheromones. (10[1])For 10 points, name this sense which allows the detection of odors by the nose. ■END■ (10[1])

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