3.3

Question 1

What are the functions of blood

Answer 1

• Transporting nutrients, wastes, and gases around the body
• Leukocytes play a role in immune response
• Platelets are important in haemostasis

Question 2

What are the components of blood

Answer 2

• Plasma
• Red blood cells
• Buffy coat: WBCs and platelets

Question 3

Function of blood plasma

Answer 3

• Carries antibodies
• Transports dissolved solute
• Carries nutrients and water

Question 4

Function of WBCs

Answer 4

Immune response

Question 5

Function of platelets

Answer 5

Important for haemostasis

Question 6

Function of erythrocytes

Answer 6

Carrying oxygen and CO2 to and from the lungs

Question 7

Erythropoiesis flow chart

Answer 7

Pluripotent SS -> myeoloid progenitor -> erythroblast -> RBC

Question 8

What can lymphoid progenitors become?

Answer 8

B and T lymphocytes

Question 9

What can myeloid progenitor cells become?

Answer 9

• Megakaryocytes
• Granulocyte precursor
• Erythrocyte precursor
• Monocyte precursor

Question 10

Haemostasis process outline

Answer 10

• Vascular spasm (constrict -> limits blood)
• Platelets bind to exposed collagen, form platelet plug
• Platelets secrete factors -> fibrinogen cleaved to become fibrin; coagulation phase