BIOL 102 Lecture Notes - Lecture 21: Olfactory Receptor Neuron, Adenylyl Cyclase, Olfactory Bulb
Document Summary
Taste buds (some on papillae bumps on tongue) contain many taste sensors (chemoreceptors) Pore on taste buds allows molecules to reach microvilli (folds of pm to increased. Area to hold more chemoreceptors) on taste sensors. Taste buds are replaced every few days. Molecular shape + charge matter result in binding to receptors triggers an ap and the release of a neurotransmitter. Detection of tastes depends on the combined effect of olfaction and gustation. Olfactory sensory neurons: directly extending to brain: dendrites with olfactory hairs (with receptors) into upper nasal cavity, protected by mucus and hair. Impulses from axons directly to olfactory bulb of brain. Large number of genes coding for different receptor proteins that can bind to different molecules: each cell expresses only 1 type of receptor = 1 gene, odorant (molecule) may be able to bind different receptors. Glomeruli group axons of olfactory sensory neuron with same receptor (brain can tell which smell by detecting which glomeruli are activated)
