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7.06

Immune System
by

Stephanie Roman

on 10 November 2013

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Transcript of 7.06

Washing Hands
water
Water Only:

Total wash time
(in seconds) 0 seconds 1 second 5 seconds 20 seconds
Washer #1 4 4 3 3
Washer #2 4 3 3 3
Average 4 3.5 3 3
Cleanliness Score

Water and Soap
Soap and Water:

Total wash time
(in seconds) 0 seconds 1 second 5 seconds 20 seconds
Washer #1 4 4 2 0
Washer #2 4 4 1 0
Average 4 4 1.5 0
Cleanliness Score

water only (right) water and soap (left)
conclusion questions

How do the results of the four trials compare?
Well in both trials in one seconds it was really dirty and also had the same average.

What, if any, errors or inconsistencies may have occurred in this experiment?
if any error had happened then the results would have been different


What suggestions do you have for improving this lab and minimizing errors or inconsistencies? Be specific.
Using a timer would be helpful and having a chart what you consider to be very dirty to clean rather than personal opinion.


Based on these results, what is the importance of soap and time for effective hand washing?
well the importance for soap and time is for your hands to be very clean and it can also prevent unwanted bacteria.

What areas of the hands retained the paint the longest, requiring careful scrubbing to get clean?
Defintley the fingers and sometimes the nails.

Analyze the graphs. What do they indicate about the time it may take to effectively wash your hands?
With water, it would take longer than just 20 seconds to have your hands completely cleaned. Possibly a minute or so. With soap although it seemed clean, if looked closely your hand still had a light tint of color. So it would take a lot less longer than with only water but still, it would take a little more than 20 seconds.


Describe the various defense mechanisms your body has to fight pathogens, nonspecific and specific. How does not washing your hands properly affect these mechanisms?
well the immune system fights the pathogens when recieving signals and not washing your hands does not affect your mechanism as long as you font touch you face or your nose and mouth.
20


5



1


0
4 3 2.5 2
Y
x
20

5

1

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4 3 1 0
Full transcript