13 2a RBC

Question 1

Red blood cells (RBC’s) - Erythrocytes are and

} Composed of

Answer 1

of large molecule of haemoglobin

} Biconcave

Question 2

haemoglobin

Answer 2

a complex protein - iron compound,

which binds with oxygen and carbon dioxide

Question 3

Erythrocytes function

Answer 3

1. Transport oxygen from lungs to the tissues
   (oxyhaemoglobin).
2. Transport carbon-dioxide from tissues to lungs
   (carboxyhaemoglobin)
3. Haemoglobin acts as a buffer and regulates the
   hydrogen ion concentration (acid base balance)
4. Carry the blood group antigens and Rh factor

Question 4

RCC: normal values

Answer 4

} adult males: 4.5-5.5 x 10 12/L

} adult females: 3.8-4.8 x 10 12/L

Question 5

} Hb (haemoglobin) normal values

Answer 5

} adult males :130-170 g/L

} adult females: 120-150 g/L

Question 6

A platelet count is an estimation

Answer 6

the number of

platelets per litre of blood.

Question 7

The normal platelet count for adults is:

Answer 7

150-400 x 10 9/L

Question 8

Primary function –platelet

Answer 8

aid blood clotting by assisting

haemostasis in injury by forming ‘plug’

Question 9

platelet structure and life

Answer 9

No nucleus, so can’t divide; life span 9–12 days

Question 10

platelet and storage

Answer 10

⅓ stored in spleen as a reserve

Question 11

thrombocyte function

Answer 11

1. Blood clotting
2. Clot retraction
3. Defence mechanism
4. Homeostasis
5. Repair and rupture of blood vessel

Question 12

normal life blood cell

Answer 12

WBC’s – 2-3 days
} RBC’s - 120 days
} Platelets – 10 days