2025 COMPLETE BIO 250 Lab 10 Blood and the Heart Straighterline
Student Name:
Access Code (located on the lid of your lab kit):
Lab Report Format Expectations
Utilize college level grammar and professional formaṄng when completing this
worksheet. Submissions without proper formaṄng, all required photos or sufficient
responses will be rejected. Pre-lab Questions
1. Research the process of erythropoiesis, and explain the role erythropoietin plays in the
body. Erythropoiesis is the process of new red blood cells, erythrocytes, are produced in
the bone marrow. This process is regulated primarily by EPO, which is a hormone
produced by the kidneys when its in response to low oxygen levels in the blood. EPO
stimulates the bone marrow bone marrow to increase the amount of red cell
production, which enhances the blood oxygen- carrying capacity. This process helps the
body to maintin sufficient oxygen under conditions like anemi, blood loss, or high
altitude.
2. Based on your response to Question 1, above, why do you think erythropoietin is a
popular “doping” drug for athletes?
Erythropoietin is a popular doping drug among athletes because it increases red blood
cell production, this boosts the blood's ability to carry oxygen. This enhances endurance
and performance, this is popular especially during sports that require sustained aerobic
activity like long-distance running. Improving oxygen delivery to muscles, EPO can delay
fatigue and improve recovery times. Using this without medical supervision is dangerous
and is banned in competitive sports.
3. How would the hemoglobin content differ in a person living in Philadelphia (Elevation:
39 feet) compared to someone living in Denver (Elevation: 5280 feet)? Explain your
reasoning using the information you provided in Question 1.
A person tha tis living in Denver, which has a much higher elevation when comapring to
Philedelphia would more likely have a higher hemoglobin content. This is due to the
lower oxygen levels at higher altitudes which triggers the kidneys to produce more EPO
which then stimulates the production of more red blood cells and hemoglobin to
,improve oxygen transport. On the other hand, someone living in Philideplhia where the
oxygen levels are higher due to lower elevation would not need as much hemoglobim
since their body recieves sufficient oxygen more easily. In
, EXPERIMENT 1: CLASSIFICATION OF BONES
Introduction Questions
1. In this experiment, you will investigate the valves utilized by the heart. What other
organs or body systems incorporate valves? List and describe these, being sure to
elaborate on how they are used. (Hint: Your response should be 4-6 sentences long.)
Other than the heart, valves are found in the veins of the circulatory system, these
valves help to maintain one-way blood flow back to the heart, in particular the lower
parts of the body.
These valves prevent backflow and are essential in overcominggravity,especially the
legs. Another body system that contains valves is the lymphatic system that ensure
lymph fluid flows in one direction toward the thoracic ducts, which helps with immune
function and fluid balance. In the digestive system, the pyloric valve control the passage
of food from the stomach to the small instetine ensure that there is proper digestion
and prevents backflow. Similarly, the urniary system also uses valves, like the ones
between the ureters and the bladder, which prevents urine from flowing backwards
into the kidneys. These valves are essential in a person's body since it helps maintain
controlled, directional flow and prevents any damage or inefficiency within their
respective systems.
Data and Observations
Insert your observations for this experiment in the table below as detailed by the lab procedure.
Table 1: Experimental Observations
Observations (with valve) and mL H2O Observations (without valve) and mL H2O
Displaced? Displaced?
When the valve is in place, the other straw Without the valve it was much more
displaces much more H20. About 10 mL of difficult to move tha water. Both straws are
H20 wer displaced. trying to move the water and amount of
water was minimal
Results and Discussion
1. What happened when you pressed on the balloon stretched over the jar? What does
this result represent?
When I pressed on the balloon it cause pressure in the cup to move water into the
Student Name:
Access Code (located on the lid of your lab kit):
Lab Report Format Expectations
Utilize college level grammar and professional formaṄng when completing this
worksheet. Submissions without proper formaṄng, all required photos or sufficient
responses will be rejected. Pre-lab Questions
1. Research the process of erythropoiesis, and explain the role erythropoietin plays in the
body. Erythropoiesis is the process of new red blood cells, erythrocytes, are produced in
the bone marrow. This process is regulated primarily by EPO, which is a hormone
produced by the kidneys when its in response to low oxygen levels in the blood. EPO
stimulates the bone marrow bone marrow to increase the amount of red cell
production, which enhances the blood oxygen- carrying capacity. This process helps the
body to maintin sufficient oxygen under conditions like anemi, blood loss, or high
altitude.
2. Based on your response to Question 1, above, why do you think erythropoietin is a
popular “doping” drug for athletes?
Erythropoietin is a popular doping drug among athletes because it increases red blood
cell production, this boosts the blood's ability to carry oxygen. This enhances endurance
and performance, this is popular especially during sports that require sustained aerobic
activity like long-distance running. Improving oxygen delivery to muscles, EPO can delay
fatigue and improve recovery times. Using this without medical supervision is dangerous
and is banned in competitive sports.
3. How would the hemoglobin content differ in a person living in Philadelphia (Elevation:
39 feet) compared to someone living in Denver (Elevation: 5280 feet)? Explain your
reasoning using the information you provided in Question 1.
A person tha tis living in Denver, which has a much higher elevation when comapring to
Philedelphia would more likely have a higher hemoglobin content. This is due to the
lower oxygen levels at higher altitudes which triggers the kidneys to produce more EPO
which then stimulates the production of more red blood cells and hemoglobin to
,improve oxygen transport. On the other hand, someone living in Philideplhia where the
oxygen levels are higher due to lower elevation would not need as much hemoglobim
since their body recieves sufficient oxygen more easily. In
, EXPERIMENT 1: CLASSIFICATION OF BONES
Introduction Questions
1. In this experiment, you will investigate the valves utilized by the heart. What other
organs or body systems incorporate valves? List and describe these, being sure to
elaborate on how they are used. (Hint: Your response should be 4-6 sentences long.)
Other than the heart, valves are found in the veins of the circulatory system, these
valves help to maintain one-way blood flow back to the heart, in particular the lower
parts of the body.
These valves prevent backflow and are essential in overcominggravity,especially the
legs. Another body system that contains valves is the lymphatic system that ensure
lymph fluid flows in one direction toward the thoracic ducts, which helps with immune
function and fluid balance. In the digestive system, the pyloric valve control the passage
of food from the stomach to the small instetine ensure that there is proper digestion
and prevents backflow. Similarly, the urniary system also uses valves, like the ones
between the ureters and the bladder, which prevents urine from flowing backwards
into the kidneys. These valves are essential in a person's body since it helps maintain
controlled, directional flow and prevents any damage or inefficiency within their
respective systems.
Data and Observations
Insert your observations for this experiment in the table below as detailed by the lab procedure.
Table 1: Experimental Observations
Observations (with valve) and mL H2O Observations (without valve) and mL H2O
Displaced? Displaced?
When the valve is in place, the other straw Without the valve it was much more
displaces much more H20. About 10 mL of difficult to move tha water. Both straws are
H20 wer displaced. trying to move the water and amount of
water was minimal
Results and Discussion
1. What happened when you pressed on the balloon stretched over the jar? What does
this result represent?
When I pressed on the balloon it cause pressure in the cup to move water into the
