Haemoglobin

What is the maximum number of oxygen molecules that one haemoglobin molecule can bind to at once?

• 1

• 2

• 4

• 8

Order these in terms of size from largest to smallest

• Red blood cell

• Haem group

• Haemoglobin

• Myoglobin

• Oxygen

In which form is most carbon dioxide carried in the blood

• Dissolved in the plasma

• Dissolved as hydrogen carbonate in the plasma

• Bound to haemoglobin as carbaminohemoglobin

• As gas bubbles

What do you call haemoglobin when it binds to hydrogen ions?

• Haemoglobonic acid

• Haemoglobin acid

• Haemoglobinic acid

• Haemobonic acid

After haemoglobin has bound to hydrogen ions, what affinity does it have for oxygen?

• Higher

• Lower

• The same

After haemoglobin has bound to oxygen molecules, what affinity does it have for subsequent oxygen molecules?

• Higher

• Lower

• The same

When hydrogen carbonate diffuses out of red blood cells, what ion diffuses in?

• Sodium

• Chloride

• Calcium

• Fluoride

What does A correspond to in the graph?

• Blood entering a muscle at rest

• Blood leaving a muscle at rest

• Blood entering an active muscle

• Blood leaving an active muscle

What does B correspond to in the graph?

• Blood entering a muscle at rest

• Blood leaving a muscle at rest

• Blood entering an active muscle

• Blood leaving an active muscle

What does C correspond to in the graph?

• Blood entering a muscle at rest

• Blood leaving a muscle at rest

• Blood entering an active muscle

• Blood leaving an active muscle