Lecture 11: Blood

Question 1

What is blood classified as? Describe its function

Answer 1

Blood is a form of specialized CT

Function: transportation of nutrients and end products, regulation and protection

Question 2

What is blood composed of ?

Answer 2

1. Erythrocytes
2. Leukocytes
3. Platelets
4. PLASMA

Question 3

What is the function of plasma?

Answer 3

Maintain osmotic pressure, transport clotting and immune function

Question 4

What are the protein solutes in plasma and what are their respective functions?

Answer 4

Albumin- Maintains osmotic pressure

Globulin- Includes immunoglobulins and antibodies

Fibrinogen- Proteins that participate in blood coagulation

Question 5

Where do the several blood cell types originate from?

Answer 5

CT of bone marrow

Question 6

What are the classifications of leukocytes?

Answer 6

• Agranular leukocytes → T and B lymphocyte production+ monocyte
  
  • Granular Leukocyte→ neutrophils, basophils and eosinophils

Question 7

What are the key features of RBC?

Answer 7

ERYTHROCYTES!

• produced via erythropoiesis
• Function: oxygen and carbon dioxide transport
• Biconcave disk: increased SA to V ratio
  
  • O2 carrying haemoglobin

Question 8

How long do erythrocytes last and what happens to them after that period of time?

Answer 8

Last around 120 days → removed in the spleen, bone marrow and liver by phagocytosis

Question 9

What are the 4 main blood groups and what antibodies and antigens to they present

Answer 9

• Blood group A → Anti-B antibody and A antigens
• Blood group B → Anti- A antibody and B antigens
• Blood group AB → No antibodies and A/B antigens
• Blood group O → Anti A and anti B antibodies and no antigens

Question 10

What are the rules of blood donations/transfusions?

Answer 10

Blood can be received if they have the same antigens

Rh+ can receive from other Rh+ and Rh-

Rh- can ONLY receive from Rh-