Bio 270 Lab 7: Senses Worksheet
Name:
Fill in the following table and answer the accompanying questions based on your observations from the lab as well as your lecture knowledge of the special senses. You should each turn in a chart with your observations, but there only needs to be one set of questions answered. So turn in your group of 4 Worksheets stapled together, and make sure one of them contains answers to the questions.
Part 1: Taste and Smell
Fill in the flavor of gum you perceived in the following blanks and compare to the actual flavor of the gum.
Actual Flavor of gum Dry tongue, nose closed Chewing, nose closed Chewing, nose open Cinnamon Spearmint Peppermint Juicy Fruit
Perform two of the following combinations and fill in your perceived flavor.
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Actual Flavor Combination |
Flavor perceived |
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Peppermint on dry tongue, cinnamon under nose |
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Spearmint on dry tongue, Juicy Fruit under nose |
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Juicy Fruit on dry tongue, Cinnamon under nose |
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Cinnamon on dry tongue, peppermint under nose |
1. Were you able to correctly identify the flavor of the gum when the gum was placed on your dry tongue? Why or why not?
2. Does the sense of taste or of smell seem to be more important in the identification of flavor?
Fill in the type of food you perceived in the following blanks and compare to the actual item.
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Dry tongue, nose closed |
Chewing, nose closed |
Chewing, nose open |
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Apple |
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Carrot |
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Onion |
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Potato |
3. Did being able to chew the item help in its identification?
Fill in the following table with a description of any deviation you had while walking the parallel lines under the following conditions.
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Action |
Status of Eyes |
Description of Deviation (if any) |
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Walk parallel line |
Eyes open |
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Eyes closed |
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Walk parallel line Head tilted to right |
Eyes open |
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Eyes closed |
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Walk parallel line Body tilted to right |
Eyes open |
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Eyes closed |
Fill in the following table your time in seconds while able to stand on the left foot under the following conditions.
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Action |
Eyes Open |
Eyes Closed |
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Body erect |
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Head tilted to right |
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Body tilted to right |
1. Did you walk less straight or stand on one leg longer when your eyes were closed? Why or why not?
2. Did tilting your body and/or head to the right inhibit your ability to walk straight or stand on one leg? What does this tell you about the importance of proprioceptors?
Record below the distance deviated from the original "x".
Trial 1 _____________cm
Trial 2 _____________cm
Trial 3 _____________cm
eyes open________________________________ eyes closed_______________________________
3. How do the two samples of writing compare? Explain.
1. Describe your observations after focusing on the American flag.
2. What color is the complement of green?
3. What color is the complement of yellow?
4. Is it the rods or cones that are involved in the above? Offer an explanation for your answer.
Sketch your results below using colored pencils to indicate the colors tested.
5. What color enters the visual field first?
6. Did you have any trouble identifying the patterns?
7. Name at least 3 activities or occupations in which color blindness would be a disadvantage.
8. In color blindness. is the retina deficiency in rods or cones or both?
1. In what direction was the power of localization most exact? Explain.
2. Were you able to hear the tuning fork when it was brought close again? If yes, what is the mechanism for this?
3. How do sound vibrations reach the organ of Corti in osseous type conduction?
4. If a patient cannot hear sounds through regular transmission, but can hear through osseous conduction, what is likely the problem?
5. How may bone conduction of sound be used in some hearing devices?
6. Which of the sound conduction routes is normally the most effective in conveying vibrations to the organ of hearing?
Part V: Pain
1. Describe your sensations as you continue to hold your elbow in cold water. Initially, you must feel the cold pain in your elbow, but over time does the sensation "travel"
2. Explain the apparent mechanism of referred pain.
Part VI: Temperature Sensations
1. Was the sensation the same in both hands when you placed your second middle finger in the hot water?
2. Why or why not?
1. List, from most sensitive to least sensitive, the body parts tested for two-point discrimination.
2. How many receptors are being stimulated when two points are felt as one?
3. Explain why some body parts are less discriminatory than others.