Physiology of Taste (Special Sense)
Taste buds on tongue on fungiform papillae (“mushroom-like projections)
Each taste bud consists of 50-100 specialized epithelial cells.
Epithelial cell receptors clustered in barrel-shaped taste buds.
Taste cells are not neurons, but depolarize upon stimulation and if reach threshold, release NT that stimulate sensory neurons.
Each “bud” contains several cell types in microvilli that project through pore and chemically sense food.
cells communicate with cranial nerve axon endings to transmit sensation to brain.
Five taste sensations
Cranial Nerves of Taste
Anterior 2/3 tongue: VII (Facial)
Posterior 1/3 tongue: IX Glossopharyngeal)
Pharynx: X (Vagus)
Category: Medical, Pathology