Card 7 / 60: Which of the following are true about the organization of the olfactory epithelium? (3 points)
A) Olfactory sensory neurons (OSNs) provide a graded response to odorants and release transmitter onto olfactory ganglion neurons which project to glomeruli in the olfactory bulb.
B) Olfactory sensory neurons expressing a receptor appropriate to an odorant fire action potentials strongly with shorter latency; other OSNs may fire to a lesser degree, or with greater latency, since their receptor may be partially activated by the odorant.
C) Olfactory sensory neurons expressing the same olfactory receptor are restricted to certain zones or strips within the olfactory epithelium, but appear to be randomly located within that zone.
D) In the adult olfactory system, neural precursor cells differentiate into olfactory sensory neurons, replacing OSNs on a regular basis.
E) Sensory neurons expressing a specific type of olfactory receptor target two and only two glomeruli in the olfactory bulb on each side of the brain.

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