Blood

Question 1

What is plasma

Answer 1

• Blood is a complex liquid (plasma) in which the cells are suspended
• more then 90% water
• many inorganic and organic substances dissolve in plasma

Question 2

What are Erythrocytes and their percentage in blood

Answer 2

Red blood cells (45%)

Question 3

What are leukocytes and their percentage in blood

Answer 3

white blood cells ( less then 1%)

Question 4

What are thrombocytes and their percentage in blood

Answer 4

Platelets (less than 1%)

Question 5

What is haemopoiesis

Answer 5

the formation of bloods cellular components from haematopoietic stem cells

Question 6

What are the function of erythrocytes

Answer 6

• transport oxygen
• flat disk shape with indent in middle like a doughnut with no hole
  -shape provides large surface area for the diffusion of oxygen across the membrane
• contain haemoglobin to transport oxygen ( can pick up 4 O2 molecules )
• red when oxygenated ( gives blood colour )
• no nucleus, organelles, mitochondria or ribosome s

Question 7

What are antigens

Answer 7

• antigens on erythrocytes are structured capable of inducing an immune response
• blood group antigens determine which blood group you possess
• recognise and bind into specific antigens

Question 8

What is the function of thrombocytes

Answer 8

• thrombocytes (or platelets) are small cell fragments, their main function is the formation of mechanical plugs during the response to vascular injuries
• no nuclei but have mitochondria

Question 9

What is the function of leucocytes

Answer 9

leucocytes (or white blood cells) are responsible for
- immune responses against infection: viral, bacterial and parasitic pathogens
- identify and destroy cancer cells
- remove dead, injured or dying cells and debris (have nucleus)