Ch. 19 A&P2 The Cardiovascular System: Blood

Along with platelet plug formation, which two mechanisms contribute to hemostasis?

Along with platelet plug formation, vascular spasm and blood clotting contribute to hemostasis.

Why is the firstborn baby unlikely to have HDN?

Because the mother is most likely to start making anti-Rh antibodies after the first baby is already born, that baby suffers no damage.

What is the approximate volume of blood in your body?

Blood volume is about 8% of your body mass, roughly 5-6 liters in males and 4-5 liters in females. For instance, a 70 kg (150lb) person has a blood volume and 5.6 liters (70 kg X 8% X 1 liter/kg).

In what way is the "traffic pattern" of lymphocytes in the body different from that of other WBC's?

Lymphocytes recirculate from blood to tissues and back to blood. After leaving the blood, other WBCs remain in the tissues until they die.

Which WBC are called granular leukocytes? Why?

Neutrophils, eosinophils, and basophils are called granular leukocytes because all have cytoplasmic granules that are visible through a light microscope

How might your hematocrit change if you moved from a town at sea level to a high mountain village?

Once you moved to a high altitude, your hematocrit would increase due to increased secretion of erythropoietin.

How many molecules of O2 can one hemoglobin molecule transport?

One hemoglobin molecule can transport a maximum of four O2 molecules, one O2 bound to each heme group.

Which formed elements of the blood are cell fragments?

Platelets are cell fragments.

From which connective tissue cells do pluripotent stem cells develop?

Pluripotent stem cells develop from mesenchyme.

What is serum?

Serum is the blood plasma minus the clotting proteins.

What are some of the symptoms of sickle-cell disease?

Some of the symptoms of sickle-cell disease are anemia, jaundice, bone pain, shortness of breath, rapid heart rate, abdominal pain, fever and fatigue.

What is the outcome of the first stage in blood clotting?

The outcome in the first stage of blood clotting is the formation of prothrombinase.

What is the function of transferrin?

Transferrin is a plasma protein that transports iron in the blood.

Which antibodies usually present in type O blood?

Type O blood usually contains both anti-A and anti-B antibodies.