blood processes

Question 1

what is hematopoiesis? where does it occur?

Answer 1

process of blood cell formation, in red bone marrow of adults

Question 2

what are all formed elements derived from?

Answer 2

a common stem cell called hemocytoblast

Question 3

hemocytoblasts differentiate into what that create what?

Answer 3

lymphoid stem cells, which create lymphocytes & myeloid stem cells (which create all other stem cells)

Question 4

what are the stimulating factor for producing blood cells?

Answer 4

hormones

Question 5

when a blood vessel is injured what begins the process of forming a blood clot (called hemostasis)

Answer 5

platelets

Question 6

what are the 3 steps of the hemostasis process?

Answer 6

1. blood vessels contract causing reduced blood loss at the wound
2. platelets are chemically attracted to the wound & stick together
3. injured tissues release tissue factor which interacts w/ the platelets causing thrombin production, thrombin + fibrinogen proteins= mesh formation

Question 7

what is an abnormal clot formed w/ in a blood vessel called? what is it called when it dislodges & floats through the blood?

Answer 7

a thrombus, embolus

Question 8

how does an abnormal clot affect the body?

Answer 8

restricts the flow of blood potentially leading to death, stroke, or a heart attack