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WorksheetsOCR A level PE - Gaseous Exchange
Total questions: 25
Worksheet time: 18mins
Gaseous exchange of O2 & CO2 that occurs at the lungs between the alveoli and the blood is which type of respiration?
External respiration
Internal respiration
Gaseous exchange of O2 & CO2 that occurs at the muscles between the blood and the muscles is which type of respiration?
External respiration
Internal respiration
O2 combines with haemoglobin to form (a)
Which three ways is CO2 transported in the blood?
Carbaminohaemoglobin
Dissolved in blood plasma
Dissolved in water as carbonic acid
Attaches to white blood cells
O2 moves from alveoli to blood because there is a ____ in the alveoli than the blood
Higher ppO2
Lower ppO2
CO2 moves from blood to alveoli because there is a ____ in the blood than the alveoli
Higher ppCO2
Lower ppCO2
O2 moves from blood to muscle because there is a ____ in the blood than the muscle
Higher ppO2
Lower ppO2
CO2 moves from muscle to blood because there is a ____ in the muscle than the blood
Higher ppCO2
Lower ppCO2
There is a higher ppO2 in the alveoli than the blood. So, O2 travels ____the diffusion gradient into the blood.
Up
Down
There is a higher ppO2 in the blood than the muscle. So, O2 travels ____ the diffusion gradient into the muscle.
Up
Down
There is a higher ppCO2 in the blood than the alveoli. So, CO2 travels ____ the diffusion gradient into the alveoli.
Up
Down
there is a higher ppCO2 in the muscle than the blood. So, CO2 travels ____ the diffusion gradient into the blood.
Up
Down
Deoxygenated blood returning to the lungs has a (a) ppO2 (than at rest)
There is a (a) diffusion O2 gradient between the alveoli and blood during exercise
During exercise steeper diffusion gradient this causes (a) and more efficient gaseous exchange
During exercise (a) O2 moves from the alveoli and combines with haemoglobin in the blood
During exercise deoxygenated blood returning to the lungs has a (a) ppCO2 (than at rest).
During exercise there is a (a) CO2 diffusion gradient between the blood and the alveoli
During exercise (a) CO2 moves from the blood into alveoli and is expired
When O2 combines with haemoglobin through diffusion at the lungs to give oxyhaemoglobin describes...
Association
Saturated
Dissociation
Oxyhaemoglobin dissociation curve
The amount of O2 combined with haemoglobin usually expressed as a % and depends on ppO2 describes...
Association
Saturated
Dissociation
Oxyhaemoglobin dissociation curve
Shows us the relationship between ppO2 and % saturation of haemoglobin...
Association
Saturated
Dissociation
Oxyhaemoglobin dissociation curve
What happens to the oxyhaemoglobin dissociation curve as exercise intensity increases?
Shifts left
Shifts right
Stays the same
The oxyhaemoglobin curve shifting to the right is known as the (a) shift
Oxyhaemoglobin dissociation curve shifts right because...
Steeper O2 diffusion gradient between the blood and muscle
Body temperature increases
Increased lactic acid
Increased carbonic acid
