Blood Flashcards Preview

A&P II > Blood > Flashcards

Flashcards in Blood Deck (91)
Loading flashcards...
1

what is the main protein found in plasma?

albumin

2

how many molecules of oxygen can be transported by one hemoglobin molecule?

4

3

What is plasma?

Nonliving fluid matrix

4

What are formed elements? Composition?

Living blood cells: erythrocytes, leukocytes, and platelets

5

Define hematocrit.

Percent of total blood volume occupied by erythrocytes

6

Give the range of hematocrit for males and females

Males 47 +/- 5
Females 42+/- 5

7

What are the physical characteristics of blood

scarlet to dark red, pH 7.35-7.45, 38C

8

What does it mean when the blood is dark red or scarlet?

Dark red is a lack of oxygen and scarlet is the presence of oxygen

9

What are the 3 functions of blood?

protection, distribution.n and regulation

10

Name the term. helps maintain normal body temperature, pH, and fluid volume

Regulation of blood

11

What describes the slow blood loss preventing infection?

Protection of the blood

12

Describe blood plasma

straw-colored, sticky fluid, 90% water, 10% dissolved solutes

13

What describes the O2 and nutrients; metabolic and hormones?

Distribution of the blood

14

Which 3 proteins compromise plasma? Percentage?

albumin (60%), globulins(34%), and fibrinogen (4%)

15

T/F. Only leukocytes are complete cells

T

16

T/F Most formed elements divide, but are continuously renewed by division of stem cells in red bone marrow

F. Most do NOT divide

17

What are the functions of erythrocytes?

Pick up O2 and release it to tissue cells and transport ~ 20% of CO2 from tissue back to lungs

18

What is the shape of erythrocytes?

biconcave disc shape

19

What is the advantage of the particular shape of an erythrocyte?

increases surface area to volume ration allowing faster O2 exchange. This allows RBCs to bend and flex

20

What are the two parts of hemoglobin?

Globin and heme

21

Why is carbon monoxide dangerous?

CO has a higher affinity than O2 for heme binding sites

22

What is the term given to blood cell formation?

hematopoiesis

23

Where does blood cell formation occur in adults?

red bone marrow

24

What is another term for hemocytoblasts?

hematopoietic stem cells

25

What are the three phases of erythropoiesis?

1. Ribosome synthesis
2. Hemoglobin accumulation
3. Ejection of nucleus and formation of reticulocytes

26

What is Erythropoietin (EPO)?

A hormone that stimulates RBS production

27

How is EPO released?

In response to hypoxia via the kidneys

28

What hypoxia?

decreased RBC count, amount of Hb, and O2 availability

29

What is blood doping?.

RBCs are drawn off and stored then replaced

30

What is the life span of erythrocytes?

100-120 days