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BIO 202L Lab 10 Worksheet- Blood and the Heart Graded A.
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Lab 10 Blood and the Heart BIO202LStudent Name: Click here to enter text.
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 building more red blood cells (Rbc’s) in
the body”. Erythroirtin is a hormone that is produced by the kidney, this
hormone stimulates the bone narrow producing red blood cells. This may be
a popular “doping” drug for athletes, because the stimulation in the bone
narrow causes an addition in producing red blood cells. This means that the
addition in red blood cells will create more oxygen .
“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 hemoglobin content differ in a person living in Denver having a higher hemoglobin content
than a person living in Philadelphia having a lower hemoglobin content because the elevation in
Denver is higher the oxygen level is less thus theres less oxygen to process.
Experiment 1: Heart Valves and Pumps Table 2: Experimental Observations
Observations (with valve) and mL H2O Observations (without valve) and mL H2O
Displaced? Displaced?
Without the valve there’s more strain making
With the valve in place amount water (h2o) it more hard to move the water (h2o) since,
that the straw displaces is higher and a both the straws were trying to move the water
approximate amount of 10ml of water (h2o) (h2o) the amout of water (h20) that was
was released. flowing was low or minimal that it should’ve
been if the valve was there.
Post-Lab Questions
“1. What happened when you pressed on the balloon stretched over the jar? What does this result
represent? “
When I press down on the balloon, it causes pressure above the jar, causing
water to enter the straw, stimulating the contracting heart, and creating
pressure in its chamber.
“2. What structure in this experiment mimics a heart valve? “
In the experiment what mimics a heart valve is the balloon over 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? “
The valve will affect the results of the experiment, because when the experiment is
performed without a valve, water will flow out of the straw, and some water will flow
down from the straw. Similar to the heart that needs the arteries to move blood through
the heart and into the body. The valves increases the pressure allowing more water to
be pushed or send to the straw. When the valve or straw is installed in place, there is
, Lab 10 Blood and the Heart BIO202L
more water in the tank than when there is no valve installed. This is because it
generates pressure, it can enhance water flow, thereby helping to prevent the back flow
of blood or water in the experiment.
“4. What other organs or body systems incorporate valves? How are they used? “
Blood vessels have valves which are used to prevent the backflow of blood.
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