1. Warm Up: “Pepsi Challenge” Which do you like bettter?

2. Taste flavor food papillae Taste buds chemical messages smell flavor saliva tongue

3. Taste Sweet, sour, salty and bitter –Umami Taste buds –Chemical sense Age and taste

4. The Tongue We now know that the tongue is not ordered as “neatly” as this

5. Taste Sensory Interaction Sensory interaction Interaction of smell and taste –McGurk Effect Interaction of other senses

6. WARM-UP: How does smell work?

7. Smell Olfaction –Chemical sense –Odor molecules –Olfactory bulb –Olfactory nerve

8. Olfaction Sense of Smell Chemical Sense We can distinguish 10,000 scents 40-50 molecules of a chemical allow us to recognize a smell Particles are absorbed into mucus covering receptor cells lining the nasal passages. This initiates smell Each nostril has 30,000,000 olfactory receptor cells found in the olfactory epithelium No classification system has been agreed on There is a strong connection between smell and memory because they are processed in the same area of the brain.

9. Smell Receptor cells in olfactory membrane Nasal passage Olfactory bulb Olfactory nerve

10. Smell (olfaction)

11. Read smell article…

12. Smell and age

13. Pheremones Powerful chemicals released by our bodies and detected by smell receptors Can act as a means of communication between animals Can influence physiological behavior Debate over the extent to which humans use them (animals rely on them heavily)

16. Other connections to smell: “branding” in stores Aromatherapy Air fresheners Effect of smell on other senses

18. Short Video Taste and Smell review and intro to touch