Gas Carriage - Oxygen

How is oxygen carried in blood?

• 1.5% dissolved in plasma, 98.5% carried by haemoglobin

• 98.5% dissolved in plasma, 1.5% carried by haemoglobin

• 100% carried by haemoglobin

• 90-98% carried by haemoglobin

What molecule in haemoglobin binds to oxygen?

• Alpha globin protein

• Beta globin protein

• Iron

• phosphate

What is co-operative binding?

• Oxygen binding promotes the RELAXED state in neighbouring globin molecules

• Oxygen binding promotes the TENSE state in neighbouring globin molecules

• Carbon Dioxide binding changes the structure from TENSE to RELAXED

• Carbon Dioxide binding changes the structure from RELAXED to TENSE

 

What state would haemoglobin be in when the partial pressure of oxygen was high?

• Relaxed, more oxygen would be released

• Relaxed, less oxygen would be released

• Tense, more oxygen would be released

• Tense, more oxygen would be released

What state would haemoglobin be in when carbon dioxide was high(low acidity)?

• Relaxed, more oxygen would be released

• Relaxed, less oxygen would be released

• Tense, more oxygen would be released

• Tense, less oxygen would be released