MCELLBI C61 Lecture Notes - Lecture 16: Olfactory Bulb, Olfactory Receptor, Black Pepper
17 May 2020
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Document Summary
Smell: the most ancient sensory feature, as all animals have smelling apparatuses. In humans, there is a nasal cavity through which particles enter. Interact w olfactory receptors which are on neurons on the interior of the nasal cavity, which generate neural impulses that go quickly into the brain via olfactory bulb. In the olfactory epithelium, there"s a layer of mucus and cilia. Olfactory receptor cells are surrounded by structural cells and stem cells. These proteins are activated by various olfactory molecules. Di erent families of animals have di erent amount of receptor proteins. Mammals have ~1000 genes > more nuanced scent detection. There are ~650 genes which look like olfactory receptors but are not functional. Called pseudogenes and are thought to do something important. Spices are treasured for their olfactory and medicinal properties. Cinnamon, cardamom, sa ron, + black pepper originates from southern india. Myrrh is native to northeast africa and the southern arabian peninsula.
