PLTW Biomedical Science Unit 3 Test
Questions and Answers 100% Pass
Explain the function of each of the major blood components - ✔✔Plasma- Job is to
transport blood cells throughout your body along with nutrients and proteins that help
maintain the body's fluid balance.
Red Blood Cells (erythrocytes)- Contain Hemoglobin, which helps carry oxygen from
the lungs to the rest of the body.
White Blood Cells(leukocytes)- Protect the body from infection.
Platelets(thrombocytes)- Help with the blood clotting proccess, by gathering at the site
of an injury.
What are platelets? - ✔✔Small fragments of cells
What are white blood cells called? - ✔✔leukocytes
What is anemia? - ✔✔Anemia is a deficiency in red blood cells or hemoglobin.
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, What is a Hematocrit, how is it tested, what can we learn from this? - ✔✔The ratio of
the volume of red blood cells to the volume total volume of blood. It is tested by taking
small blood samples. It helps diagnose anemia, and leukemia
Compare normal vs. sickle-shaped red blood cells - ✔✔1. Normal: Circular shape
2. Sickle-shaped: Cresent moon, or sickle shape
How do sickle-shaped red blood cells lead to decreased oxygen flow to the body
tissues? - ✔✔The sickle shape can cause a blockage in small blood vessel, which makes
it harder for oxygen to travel through the body
What is sickle cell disease? - ✔✔It is an inherited blood disorder that causes the change
in the primary structure of the hemoglobin, and it makes the cells look like sickles.
Why does the sickling of red blood cells of red blood cells cause health problems? -
✔✔1. The sickle shape of the red blood cells makes it harder for the blood to travel
through the body
2. The sickle shape can also cause blockages stopping the flow of red blood cells
What is sickle cell anemia? - ✔✔A mutation in a gene causes a problem making the
hemoglobin of the red blood cells. It's a genetic disorder causing red blood cells to be
rod/sickle shaped. This causes them to get stuck in capillaries and the bodies cells
become deprived of oxygen
Brittie Donald, All Rights Reserved © 2025 2
Questions and Answers 100% Pass
Explain the function of each of the major blood components - ✔✔Plasma- Job is to
transport blood cells throughout your body along with nutrients and proteins that help
maintain the body's fluid balance.
Red Blood Cells (erythrocytes)- Contain Hemoglobin, which helps carry oxygen from
the lungs to the rest of the body.
White Blood Cells(leukocytes)- Protect the body from infection.
Platelets(thrombocytes)- Help with the blood clotting proccess, by gathering at the site
of an injury.
What are platelets? - ✔✔Small fragments of cells
What are white blood cells called? - ✔✔leukocytes
What is anemia? - ✔✔Anemia is a deficiency in red blood cells or hemoglobin.
Brittie Donald, All Rights Reserved © 2025 1
, What is a Hematocrit, how is it tested, what can we learn from this? - ✔✔The ratio of
the volume of red blood cells to the volume total volume of blood. It is tested by taking
small blood samples. It helps diagnose anemia, and leukemia
Compare normal vs. sickle-shaped red blood cells - ✔✔1. Normal: Circular shape
2. Sickle-shaped: Cresent moon, or sickle shape
How do sickle-shaped red blood cells lead to decreased oxygen flow to the body
tissues? - ✔✔The sickle shape can cause a blockage in small blood vessel, which makes
it harder for oxygen to travel through the body
What is sickle cell disease? - ✔✔It is an inherited blood disorder that causes the change
in the primary structure of the hemoglobin, and it makes the cells look like sickles.
Why does the sickling of red blood cells of red blood cells cause health problems? -
✔✔1. The sickle shape of the red blood cells makes it harder for the blood to travel
through the body
2. The sickle shape can also cause blockages stopping the flow of red blood cells
What is sickle cell anemia? - ✔✔A mutation in a gene causes a problem making the
hemoglobin of the red blood cells. It's a genetic disorder causing red blood cells to be
rod/sickle shaped. This causes them to get stuck in capillaries and the bodies cells
become deprived of oxygen
Brittie Donald, All Rights Reserved © 2025 2
