Anatomy and Cell Biology 3319 Lecture Notes - Lecture 2: Epiglottis, Frontal Lobe, Entorhinal Cortex
23 Jun 2016
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Acb 3319 olfactory we"ll be focusing on the pns, broken down into sensory and motor division. Receptors for our special senses use chemoreceptors, distinct receptor cells; detect chemical stimuli and send that signal to brain via cranial nerves in saliva gets sent to brain. We have physical breakdown with teeth/tongue and chemical breakdown using enzymes found. Once food is broken down, those food chemicals will activate chemoreceptors and then info tongue. 4 diff types: circumvallate: located between posterior third and anterior 2/3s of the tongue, in a v shape. Structurally they are dome-shaped (seen in histo image: foliate: located on lateral, back side of tongue. Arranged in vertical folds: filiform: cover most of the anterior surface of the tongue. Cone-shaped: fungiform: scattered amongst filiform papillae but mostly located near the tip and sides of the. Of the 4 papillae types, 3 of them have taste buds. For circumvallate and foliate papillae, they"re located on the lateral sides while fungiform is.
