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Experiment on salivary

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Introduction

Experiment on salivary secretion and taste The objective of the experiment: The objective is "To investigate aspects of the control of salivary secretion and the location and function of the taste receptors in the mouth". Methodology For the experiment of salivary secretion in the human subject, we worked in groups of 6, for this experiment, the person who carried out the salivary secretion was a 18 year old female. The second experiment was the taste experiment, we stayed in the same groups, and a 18 year old male carried it out. In the salivary experiment the female volunteer tilt her head forward, then she swallowed her sliver before we timed the experiment, this stopped them from swallowing during the experiment as well as allowing them to keep their tongue and jaw still during the experiment, as it is timed. We did these 3 times, and each of the periods was timed for 2 minutes. The sliver after the 2 minutes was spat into a beaker, the beaker allowed us to measure the amount of sliver produced, this then allowed us to calculate the resting rate when the sliver was collected. After the salivary secretion, we did the stimulated secretion, this was to place 1 ml distilled water under the tongue, and then vigour sly chew, spitting out saliva into a beaker for 4 minutes. ...read more.

Middle

for Salivary Secretion Rate ml Different Conditions Group Resting Chewing Acid Substances Effect of Exercise 1 13 54 93 18 2 30 42 54 36 3 15 21 31.5 18 4 10 22.5 34.5 13.5 5 20 19.5 54 52.5 6 18 42.0 39 15 7 20 63 117 30 8 40 105 90 6 9 25 16.5 100.5 19.5 10 26 33 54 15 Since I have the results, to get an average answer, I worked out the mean and the standard deviation; I used Microsoft Excel to calculate both of them as it allows me to use formulas. Table 4: Class Data (Averages) Calculated using Microsoft Excel Condition Salivary Secretion Rate (ml/hour) Standard Deviation (ml/hour) Extreme values Resting 21.7 8.9 <3.9 or >39.5 Chewing 41.9 27.1 >96.1 Acid Substances 66.8 30.6 <5.6 or >128 Effect of Exercise 22.3 13.7 >49.7 The extreme values are shown below, as the table shows that group 5 has similar results that match other group's results. The similarities are there salivary rate increasing after chewing and consuming acidic flavourings. However, my group (8) have different values to the other groups, this could be that due to the fact that our volunteer had a saw throat and a dry cough. Table 5: Extreme Data Values for Table 3 Group Condition Salivary Secretion Rate (ml/hour) ...read more.

Conclusion

the height, weight, age or gender of the person was not controlled, therefore I cannot say to an extent if the outcome would have been affected by these factors. The tongue is a large skeletal muscle, on average; the adult has 9000 taste buds on the tongue. The tongue is covered in little bumpy lumps call papillae, there are 3 types of papillae, and these are: * Filiform * Fungi form * Circumvallates "The human tongue can detect five basic taste components, sweet, sour, salty, bitter and umami. The sense of taste is referred to as a gustatory sense; there are no distinct regions for tasting different tastes'. (Taken from http://en.wikipedia.org/wiki/Tongue) The diagram below shows the different types of glands: Taken from: http://health.enotes.com/images/cancer/gec_02_img0183.jpg The last solution was Phenylthiourea, and this can only be tasted by a few people. The people that can taste this are because of a genetic inheritance. In my group the male could not taste the solution, therefore it resembled that he did not genetically inheritance. Graphs The line graph below shows the secretion rate for all the groups, I have calculated the average amount of saliva for 1 hour; this is the data from table 3: The bar chart below shows the Standard deviation that I worked out for the whole class using Microsoft Excel, and the average secretion rate for 1 hour. ...read more.

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