Blood and Hemostasis #4 9/17/15 Flashcards
1
Q
What is the composition of blood?
A
45% Erythrocytes
55% plasma
2
Q
What is one of the main limiting factors in erythropoiesis?
A
Availability of dietary iron
3
Q
_____ serves as a storage buffer for iron.
A
Ferritin
4
Q
What is the lifespan of a RBC?
A
120 days
5
Q
______ is the major breakdown product of hemoglobin.
A
Bilirubin
6
Q
_____ is only found in meat.
A
B12 * needed to make RBC’s
7
Q
How is Erythropoiesis regulated?
A
Hormonally
8
Q
Decreased oxygen delivery to the kidney causes _______________.
A
the secretion of erythropoietin, which activates receptors in bone marrow, leading to an increase in the rate of erythropoiesis.
9
Q
What causes anemia?
A
Decrease in ability of RBC to carry oxygen due, to:
- decrease in the total # of RBC’s
- Diminished concentration of hemoglobin
10
Q
What makes erythrocytes?
A
Erythropoietin
