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BIO 202L Lab 10 Worksheet - Blood and Heart
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BIO 202L Lab 10 Worksheet - Blood and Heart|BIO 202L Lab 10 Worksheet - Blood and Heart
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Lab 10 Blood and the Heart BIO202LStudent Name: -
Access Code (located on the lid of your lab kit): -
Pre-Lab Questions:
1. Research the process of erythropoiesis, and explain the role erythropoietin plays. Why is this
a popular “doping” drug for athletes?
Erythropoiesis is the production of blood cells, which carry oxygen. Athletes inject it to increase the
amount of oxygen in their blood thus increasing their aerobic capacity. If too many are injected it can
lead to the blood thickening, clotting and heart attack/stroke.
2. How would the hemoglobin content differ in a person living in Philadelphia (Elevation: 39
feet) compared to someone living in Denver (Elevation: 5280 feet)? Why?
The amount of hemoglobin in blood increases at higher elevations, so yes the content for someone in
Denver would be different than someone living in Philadelphia. This is due to the pressure difference at
varying altitudes. Oxygen molecules are further apart at higher altitudes because there is less pressure
to push them together.
Experiment 1: Heart Valves and Pumps Table 2: Experimental Observations
2
Water moved through both straws and didn’t go Water went through both straws and when
back down the one with the valve, but did go pressure was released from the balloon the water
back down the one without the valve. went back down the straw back into the jar.
About 5 ML About 4 mL
Post-Lab Questions
1. What happened when you pressed on the balloon stretched over the jar? What does this
result represent?
Water came up through the straws. This represents blood pressure
2. What structure in this experiment mimics a heart valve?
The cut off neck of the balloon. that is taped to the straw.
3. How did the valve influence the experimental results? If possible, indicate the difference (in
mL) in water displaced with the valve versus without the valve. Does the valve enhance the
water flow, and why?
It determined how much liquid would leave the jar and stay out of the jar. So the amount of
blood that enters the heart will keep moving forward, as opposed to returning to the heart.
4. What other organs or body systems incorporate valves? How are they used?
Veins and the valves prevent backflow
Lymph ducts prevent backflow of fluid so that the lymph flows forward instead of backwards
, Lab 10 Blood and the Heart BIO202L
Experiment 2: Effect of Chelation Therapy on Arterial Plaque Levels
Table 3: Eggshell Observations
Thin layer of tiny bubbles
Thin layer of tiny bubbles
1 Nothing formed and it was a thicker
formed
layer than the 4%
Beginning to float, about the Beginning to float, about the
2 No change
same amount of bubbles same amount of bubbles
Multiple pieces have broken
3 No change 1 piece has broken off
off.
Continuing to break apart and Continuing to break apart at a
a small piece of white is faster rate than the 4% and a
coming though any of the more of the white is coming
4 No change
cracks, I think it is the lining though any of the cracks, I
that lines the inside of the think it is the lining that lines
shell the inside of the shell
Continuing to disintegrate. Continuing to disintegrate
Larger pieces than the 8%. more rapidly than the 4%.
5 No change. The shells are still attached to More small pieces. The inside
the lining but the lining is of the egg lining is still intact
separate but separated from the shells.
Bubbles haven’t changed Bubbles haven’t changed
6 No change much, disintegration similar much, disintegration similar
to day 5, minor changes. to day 5 - minor changes.
Floating, totally broken apart
into many small pieces, the
Floating, broken apart into
lining of the egg has come
small and large pieces, the
through cracks, bubbles have
lining of the egg has come
solidified in areas exposed to
7 No change through the cracks in many
has remained kind of intact
places, bubbles have
but separate from the shells.
solidified areas exposed to
The disintegration is more
the outside environment.
complete in this solution than
the 8%
Post-Lab Questions
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