Gustation and Olfaction (Taste and Smell). chemoreceptors chemical substance dissolved in mucus G-protein-linked receptors all smell some taste sweet bitter umami (e.g., glutamate) channel-linked receptors some taste sour salt. Rhoades and Pflanzer, Human Physiology
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Rhoades and Pflanzer,
cf. Fig. 10-6 Ganong
received from all parts of the tongue
J. Clin. Invest.115:3177-3184 (2005)
Ganong, 20th edition
Fig. 10-5 Ganong
olfactory tract (mixed)
temporal lobe portions of limbic system
thalamic relay NOT required
Smells can rapidly trigger emotional responses.
a chemical released by one animal that produces an emotional/behavioral response in another animal
probably exist in humans
may work via olfactory systemOlfactory Pathway