formation of wbc and platelets Flashcards
Like erythrocyte production, the formation of leuko- cytes and platelets is stimulated by ______________.
hormones
These __________ and _________ not only prompt red bone marrow to turn out leukocytes
colony stimulating factors (CSFs)
and
interleukins
marshal up an army of WBCs to ward off attacks by enhancing the ability of mature leukocytes to protect the body
colony stimulating factors (CSFs)
and
interleukins
____________ are released in response to specific chemical signals in the environment, such as inflammatory chemicals and certain bacteria or their toxins
The colony stimulating factors (CSFs) and interleukins (???)
The hormone ____________ accelerates the production of platelets from megakaryocytes, but little is known about how that process is regulated.
thrombopoietin
When bone marrow problems or disease conditions such as a plastic anemia or leukemia are suspected, a __________ is used to withdraw a small sample of red marrow from one of the flat bones(ilium or sternum) close to the body surface
special needle
a special needle is used to withdraw a small sample of red marrow from one of the _____________ close to the body surface. (give the two examples)
flat bones; sternum or ilium
This procedure, withdrawing a small sample of red marrow from one of the flat bones, provides cell for a microscopic examination called a ____________.
bone marrow biopsy
Low blood O2 — carrying ability due to:
• Decreased RBC count
• Decreased amount of hemoglobin
• Decreased availability of O2
________ releases erythropoietin.
Kidney (and liver to smaller extent)
_________ stimulates red bone marrow.
Erythropoietin
Enhanced erythropoiesis increases _______________.
RBC count
______ is the only fluid tissue in the body.
Blood
living blood cells
formed elements
Blood is a complex connective tissue in which living blood cells, the formed elements, are suspended in a nonliving matrix called _____________.
Plasma
The _______ and ________ fibers typical of other connective tissues are absent from
blood, but dissolved proteins become visible as __________ during blood clotting.
collagen and elastin fibers;
fibrin strands
___________ and ___________ contribute less than 1 percent of the total volume of blood sample.
White Blood Cells
and
Platelets
Function: Defense and Immunity
Leukocytes (white blood cells)
Function: Blood clotting
Platelets
crucial to body defense against disease
Leukocytes or White Blood Cells
_____ the only complete cell in the blood.
White Blood Cell (Leukocytes)
_______ form a protective, movable army that helps defend the body against damage by bacteria, viruses, parasites, and tumor cells.
Leukocytes
A process which WBC are able to slip into and out of the blood vessels
Diapedesis
Platelets are fragments of bizarre multinucleate cells called _________.
Megakaryocytes
