2. Haemoglobin

Question 1

haemoglobin

Answer 1

1. inside red blood cells
2. quaternary structure
3. haem group (containing iron)
4. high affinity for O2 (carrys 4)

Question 2

greater concentration of dissolve oxygen

Answer 2

higher pO2

Question 3

greater concentration of dissolved CO2

Answer 3

higher pCO2

Question 4

oxygen loads onto haemoglobin to form oxyhemoglobin where there is a

Answer 4

high pO2

Question 5

oxyhaemoglobin unloads its oxygen where there a

Answer 5

low pO2

Question 6

aveoli have high pO2

Answer 6

oxygen loads onto haemoglobin

Question 7

cells respire low pO2

Answer 7

oxyhamoglobin unloads oxygen

Question 8

why is the dissociation curve s shaped

Answer 8

1. Hb combines with 1st O2 = shape alters, easier to load O2 (steep bit)
2. Hb saturated = harder for O2 to join (levels off

Question 9

the Bohr effect

Answer 9

1. cells respire, produce CO2, higher pCO2
2. increased rate of oxygen unloading
3. curve shifts right. saturation of blood with O2 is lower for a given PO2 (more O2 being released)

Question 10

organisms in environment with low pO2

Answer 10

haemoglobin with higher affinity for O2 than humans

dissociation is to the left

Question 11

organisms which are very active & have high O2 demand

Answer 11

haemoglobin with lower affinity for O2 than humans

curve is to the right