haemoglobin

Question 1

where is haemoglobin found

Answer 1

red blood cells

Question 2

what is the role of haemoglobin

Answer 2

to carry oxygen around the body

Question 3

what is the structure of haemoglobin

Answer 3

large protein with a quaternary structure made up of 4 polypeptide chains

Question 4

what does each chain have

Answer 4

a haem group which consists of an iron ion (red colour)

Question 5

how many oxygen molecules can haemoglobin carry

Answer 5

4

Question 6

what is it called when oxygen joins to haemoglobin

Answer 6

oxyhaemoglobin

Question 7

define association/loading

Answer 7

when an oxygen molecule joins to haemoglobin

Question 8

define dissociation/unloading

Answer 8

when oxygen leaves oxyhaemoglobin

Question 9

what does affinity for oxygen mean

Answer 9

the tendency a molecule has to bind with oxygen

Question 10

what is one condition that affects haemoglobins affinity

Answer 10

partial pressure for oxygen

Question 11

define partial pressure of oxygen (pO2)

Answer 11

measure of oxygen concentration

Question 12

if there is a greater concentration of dissolved oxygen what will the partial pressure be like

Answer 12

there will be a high partial pressure

Question 13

as partial pressure increases …

Answer 13

haemoglobins affinity for oxygen increases

Question 14

alveoli in lungs 
oxygen concentration 
pO2
affinity 
load/unload

Answer 14

high concentration
high pO2
high affinity
load

Question 15

respiring cells
oxygen concentration 
pO2
affinity 
load/unload

Answer 15

low concentration
low pO2
low affinity
unload