Ex 3 Lecture: BLOOD

Question 1

What are the functions of blood?

Answer 1

Transportation
Protection
Regulation

Question 2

What percentage of body weight does the blood make up?

Answer 2

8%

Question 3

What is the blood composed of?

Answer 3

Plasma
Formed elements

Question 4

What is plasma?

Answer 4

liquid portion of blood

Question 5

What is serum?

Answer 5

liquid portion of plasma that remains unclotted

Question 6

What are the 3 major categories of plasma proteins?

Answer 6

Albumins (most abundant)
Globulins (antibodies)
Fibrinogen

Question 7

Where are plasma proteins formed? What is the exception?

Answer 7

Liver, except globulins

Question 8

What is included in the formed element component of blood?

Answer 8

Erythrocytes
Platelets
Leukocytes

Question 9

What are the characteristics of erythrocytes?

Answer 9

contain hemoglobin
carry oxygen to tissues and cells
anucleated
Live for 120 days
Biconcave disc shape

Question 10

What are the components of Hemoglobin?

Answer 10

Heme (iron containing pigment)
Globin (protein)

Question 11

What does Globin consist of?

Answer 11

two alpha and two beta subunits
each subunit binds to heme group

Question 12

What part of the heme group binds to the oxygen?

Answer 12

the iron part of the heme group binds reversibly with one molecule of oxygen

Question 13

What is Erythropoiesis?

Answer 13

production of erythrocytes (red blood cells)

Question 14

What is Hematopoiesis?

Answer 14

referes to the production of blood cells

Question 15

What is leukopoiesis?

Answer 15

production of leukocytes (white blood cells)

Question 16

What is thrombopoiesis?

Answer 16

production of thrombocytes (platelets)

Question 17

What are the dietary requirements for erythropoiesis?

Answer 17

Iron
Vitamin B12
Folic acid

Question 18

where does erythropoiesis take place?

Answer 18

red bone marrow