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The Nose Knows: Smell, Taste, and Flavor Perception

Explore the relationship between smell, taste, and flavor perception through a series of sensory experiments, testing the ability to identify flavors, scents, and tastes.

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The Nose Knows: Smell, Taste, and Flavor Perception

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  1. 12.4-5 “The Nose Knows” Mini Lab 2.1 Atoms, Ions, and Molecules Sponge: Set up Cornell Notes on pg. 51 Topic: 12.4-5 “The Nose Knows” Mini Lab Essential Question: None.

  2. How are smell and taste related? • 75-80% of taste is actually smell • The perception of a food’s taste comes from a complex combination of sensory inputs from chemical receptors on the tongue and at the top of the nasal passages

  3. Pg. 51 Taste vs. Flavor

  4. Taste vs. Flavor • Taste- one of the four (five?) perceptions that come from the tongue’s taste receptors • Sweet • Sour • Salty • Bitter • *Umami

  5. Taste vs. Flavor • Flavor- a particular kind of taste/smell experience • Cherry • Orange • Lime • Lemon • Strawberry • Honey

  6. The Nose Knows (7m3s) P. 50 • Please take 10-15 bullets

  7. Lab 31- Part EThe Nose Knows

  8. Part E---The Nose Knows • Materials • 4 Dum Dums • A clock or phone • timer • Lab paper for recording observations

  9. Part E---Directions: The Nose Knows • 1. Partner #1: Close your eyes and pinch your nose shut with your fingers. • 2. Partner #2: Go see Mrs. McCobb, select a candy, but DO NOT TELL YOUR PARTNER THE FLAVOR. • 3. Partner#1: Place the candy in your mouth. Tell your partner what flavor you think the candy is. • 4. Partner #2:. Quickly record the volunteer's observations in the first box on the data table and go to the next step. • 5. Partner #2: At 30 seconds ask your partner to identify the flavor of the candy. Record. • 6. Partner #2: When the candy has been in your partner’s mouth for about 60 seconds again ask him or her to identify the flavor of the candy. Record. • 7. Partner #2: After you've finished recording the information for step 6, tell the volunteer to open his or her nose and immediately describe any differences in the sensations in his or her mouth. Record these observations in your data table, and then ask the volunteer to identify the flavor of the candy. • 8. Partner #2: You may now reveal the true flavor of the candy. Record it on the sheet of paper below your data table. • 9. Change roles and repeat the activity.

  10. Learning Extension Objective: Test your lab partner’s ability to recognize the tastes of apple, potato, carrots, and onions. 1. Have your partner close his/her eyes 2. Place a small piece of one of the test substances on your partner’s tongue 3. Ask your partner to identify the substance without chewing or swallowing it 4. Repeat the procedure for the 3 other substances There is nothing to record for this portion of the lab

  11. Lab Report 31: Smell and Taste

  12. Part B- Sense of Smell Lab JUST KIDDING...

  13. It will be more like this…

  14. Part B- Sense of Smell Objective: Test your laboratory partner’s ability to recognize the odors of the bottled substances available in the laboratory 1. Partner #1 MUST keep their eyes SHUT 2. Hold the bag with the scent about 4 cm under your partner’s nostrils for about 2 seconds 3. Ask your partner to identify the odor, and then close the bag 4. Record your partner’s response (+ / O) 5. Repeat. 8 substances total will be tested. 6. Repeat the WHOLE procedure over again, but present the scents to your partner in a different order. 7. Switch to partner #2 and repeat with “new” scents Do NOT give them feedback. Eyes shut the whole time

  15. +/o +/o Caramel Butterscotch Oatmeal Go in different order

  16. Part B- Sensory Adaptation Objective: Determine the time it takes for your partner to experience olfactory sensory adaptation 1. Ask partner #1 to breathe in through their nostrils and exhale through the mouth 2. Choose a scent, and open the bag 3. Hold the bag approx. 4 cm under partner #1’s nose 4. Keep track of the time until your partner is no longer able to detect the odor of the substance (3 minutes MAX) 5. Record your results. 6. Switch partners. 7. Repeat with three other substances. (4 total) REMEMBER: Switch partners between scents to allow your nose to relax (approx 5 min between tests)

  17. Part D- Sense of Taste Objective: Map the distribution of the receptors for the primary taste sensation on your partner’s tongue. 1. Ask your partner to rinse his/her mouth with water and then partially dry the surface of the tongue with a paper towel 2. Moisten a clean cotton swab with sugar solution 3. Touch several regions of your partner’s tongue with the swab 4. Each time your touch the tongue, ask your partner to report if a SWEET sensation is experienced NEVER DOUBLE DIP YOUR Q-TIP IN THE SOLUTIONS Make sure to test the tip, sides, and back of the tongue, cheek, gums, and roof of mouth in this manner 5. Record your partner’s responses with a + if the taste was identified or O if no taste identified 6. Rinse/dry mouth- repeat the procedure using the other three test solutions.

  18. Sample Student Recording o o o o o o o + + + + + + + How would you describe the distribution of the sweet receptors on the tongue?

  19. Part A/C • Vocabulary/Fill in the Blank • Complete on your own- due Wednesday • Pg. 450-454

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