NROC34H3 Study Guide - Final Guide: High-Speed Camera, Angular Velocity, Midbrain Tectum
Document Summary
Pathway: antenna (receptors) antennal lobe (local & projection neurons) mushroom body (keyon cells) lateral horn (lateral horn neurons) There are no clear parameters to describe relationships of different odors. Co(cid:448)er (cid:272)he(cid:373)ose(cid:374)sory regio(cid:374)s of a(cid:374)te(cid:374)(cid:374)ae, (cid:449)ith (cid:373)ultiple orc"s ha(cid:448)i(cid:374)g differe(cid:374)t odor spe(cid:272)ifi(cid:272)ities. Receptors are found in the antennae and maxillary palps. Antennae have all four types of sensilla (large and small basiconic, coeloconic, trichoid) Maxillary palp have only large basiconic sensilla. Sensillum have pores allowing odors to pass and come in contact with sensory neurons. When odor (usually hydrophobic) enters sensillum lymph, molecule binds or22a (gpcr) which allows ion influx through orco. When ion concentrations are very high from the start, the 2 channels act as an ionotropic receptor an allow greater influx on ions into cell. Orco is a coreceptor required for all odor receptor (or) genes and each odor receptor neuron (orn) expresses one or a few ors (for specificity)
