The Special Senses Olfactory Sense.

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Presentation transcript:

The Special Senses Olfactory Sense

Olfactory Senses The Nose …

Review: Cranial Nerve Olfactory Bulb Olfactory Tracts

Olfactory Sense Olfactory epithelium: Mixture of receptors Support cells Glands Basel stem cells Olfactory Receptor Cell

Olfactory Sense Olfactory Receptor Cells Video Clip Olfactory Receptor Cells Contain an exposed knob with up to 20 cilia covered in mucus… Pick up dissolved odorant Axons penetrate Cribriform plate to synapse into Olfactory Bulb Olfactory bulb synapse into Olfactory Tract Olfactory Tract synapse into Olfactory Cerebral Cortex Olfactory Cortex synapse into Hypothalamus Able to distinguish between 2000-4000 odorants! Specialize to respond to certain chemicals..!!

Olfactory Cortex & Hypothalamus

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