Type I (dark cells) 55-75%
Extend base to apex of bud
Have dense granules in cytoplasm, partciularly apically
Irregular nucleus
Rough endoplasmic reticulum
Long branched apical microvilli
Type II (light cells) 20%
Extend base to apex of bud
Large oval nucleus
Smooth endoplasmic reticulum
Short apical microvilli
Type IV (dark cells)
Do not reach taste pore
Dense core vesicles
Rough endoplasmic reticulum
Precursor cell for other types? interneuron? or mechanoreceptor?
Type III (intermediate cells) 5-15%
Extend base to apex of bud
Similar to Type II, with dense cored vesicles in cytoplasm particularly at base of cell
Synapses with afferent nerves
Cell types in taste buds
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