19.4 formed elements Flashcards Preview

Bio 364 Lecture Exam 1 > 19.4 formed elements > Flashcards

Flashcards in 19.4 formed elements Deck (39):
1

what are the formed elements of the blood?

RBC
WBC
platelets

2

what are the 2 classifications of leukocytes?

granulocytes and agranulocytes

3

what is the difference between a granulocyte and an agranulocyte?

granulocytes have cytoplasm with large granules and multilobed nuclei
agranulocytes have cytoplasm with small granules and its nuclei are not lobed

4

what are the 3 types of granulocytes?

neutrophils
eosinophils
basophils

5

what is the fn of a neutrophil?

phagocytize debris

6

what is the fn of an eosinophil?

reduce inflammation

7

what is the fn of a basophil?

histamine and heparin release

8

what type of leukocyte is responsible for phagocytizing debris?

neutrophil

9

what type of leukocyte is responsible for reducing inflammation?

eosinophil

10

what type of leukocyte is responsible for histamine and heparin release?

basophil

11

what are the 2 types of agranulocytes?

lymphocytes
monocytes

12

what is the fn of a lymphocyte?

produce antibodies

13

what is the fn of a monocyte?

phogocytic; exit the blood stream and become macrophages

14

what type of leukocyte is responsible for production of antibodies?

lymphocyte

15

what type of leukocyte is responsible for becoming macrophages outside the blood stream?

monocyte

16

what is another name for platelet?

thrombocyte

17

what is the structure of a platelet?

fragment of a cell

18

what is the fn of platelets?

form platelet plugs
release chemical necessary for bl clotting

19

how much of the formed elements are made up by erythrocytes?

95%

20

describe the structure of an RBC

lack nuclei
biconcave disc

21

what is the name for the process of blood cell production?

hematopoiesis
hemopoiesis

22

all formed elements derive from

hemoblasts

23

what are the components of RBCs

1/3 hemoglobin
2/3 lipids, atp, carbonic anhydrase

24

what is the fn of carbonic anhydrase?

necessary for gas exchange

25

what type of blood cell lives for 120 days?

erythrocytes

26

describe hemoglobin

pigmented protein

27

where is O2 in the blood in order to transport it from lungs to tissues?

98.5% attached to hemoglobin on RBC
1.5% dissolved in plasma

28

where is CO2 in the blood in order to transport it from tissues to lungs?

7% dissolved in plasma
23% in combo with hemoglobin
70% transported as bicarbonate ions

29

how is CO2 changed to bicarbonate ions for transport in the blood?

CO2 + H2O >>carbonic anhydrase enzyme>> H2CO3 (carbonic acid) >>>> H+ + HCO3-

30

describe the structure of hemoglobin

4 polypeptide chain (called a globin)
each bound to an Fe containing heme group

31

what is the heme group?

the pigmented molecule to which a single O2 can combine
made of Fe and a non Fe part which is turned into bilirubin

32

how many Hgb per RBC?

250,000

33

where does CO2 bind on the hemoglobin?

on a globin

34

what is erythropoiesis?

production of RBC

35

describe the intermediate cells in erythropoiesis

hemocytoblast >>> proerythroblast >>> early erythroblast >>> intermediate erythroblast >>> late erythroblast >>> reticulocyte >>> circulating erythrocyte

36

what is erythropoietin?

hromone that stimulates RBC production

37

where is erythropoietin produced and why?

in kidney in reponse to low SPO2 levels

38

lysosomes from macrophages breakdown

hemoglobin into amino acids, iron and bilirubin

39

what happens to bilirubun after it is released from the heme group?

it travels through the plasma into the liver where it becomes conjugated
it is then excreted in urine or feces