formation of wbc and platelets

Question 1

Like erythrocyte production, the formation of leuko- cytes and platelets is stimulated by ______________.

Answer 1

hormones

Question 2

These __________ and _________ not only prompt red bone marrow to turn out leukocytes

Answer 2

colony stimulating factors (CSFs)
and
interleukins

Question 3

marshal up an army of WBCs to ward off attacks by enhancing the ability of mature leukocytes to protect the body

Answer 3

colony stimulating factors (CSFs)
and
interleukins

Question 4

____________ are released in response to specific chemical signals in the environment, such as inflammatory chemicals and certain bacteria or their toxins

Answer 4

The colony stimulating factors (CSFs) and interleukins (???)

Question 5

The hormone ____________ accelerates the production of platelets from megakaryocytes, but little is known about how that process is regulated.

Answer 5

thrombopoietin

Question 6

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

Answer 6

special needle

Question 7

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)

Answer 7

flat bones; sternum or ilium

Question 8

This procedure, withdrawing a small sample of red marrow from one of the flat bones, provides cell for a microscopic examination called a ____________.

Answer 8

bone marrow biopsy

Question 9

Low blood O2 — carrying ability due to:

Answer 9

• Decreased RBC count
• Decreased amount of hemoglobin
• Decreased availability of O2

Question 10

________ releases erythropoietin.

Answer 10

Kidney (and liver to smaller extent)

Question 11

_________ stimulates red bone marrow.

Answer 11

Erythropoietin

Question 12

Enhanced erythropoiesis increases _______________.

Answer 12

RBC count

Question 13

______ is the only fluid tissue in the body.

Answer 13

Blood

Question 14

living blood cells

Answer 14

formed elements

Question 15

Blood is a complex connective tissue in which living blood cells, the formed elements, are suspended in a nonliving matrix called _____________.

Answer 15

Plasma

Question 16

The _______ and ________ fibers typical of other connective tissues are absent from
blood, but dissolved proteins become visible as __________ during blood clotting.

Answer 16

collagen and elastin fibers;
fibrin strands

Question 17

___________ and ___________ contribute less than 1 percent of the total volume of blood sample.

Answer 17

White Blood Cells
and
Platelets

Question 18

Function: Defense and Immunity

Answer 18

Leukocytes (white blood cells)

Question 19

Function: Blood clotting

Answer 19

Platelets

Question 20

crucial to body defense against disease

Answer 20

Leukocytes or White Blood Cells

Question 21

_____ the only complete cell in the blood.

Answer 21

White Blood Cell (Leukocytes)

Question 22

_______ form a protective, movable army that helps defend the body against damage by bacteria, viruses, parasites, and tumor cells.

Answer 22

Leukocytes

Question 23

A process which WBC are able to slip into and out of the blood vessels

Answer 23

Diapedesis

Question 24

Platelets are fragments of bizarre multinucleate cells called _________.

Answer 24

Megakaryocytes