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22 Cards in this Set
- Front
- Back
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What is haemoglobin? |
It is a globular protein that binds to oxygen and transports it around the body |
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What are the features of haemoglobin? |
It has hight affinity to oxygen When red blood cells reach tissues and muscles the oxygen dissociates from haemoglobin For everything polypeptide chain formed there is a haem molecule formed this is made of iron ions and give the colour red to haemoglobin |
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What is partial pressure? |
It is the level of gas concentration in cells eg pO2 |
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How does partial pressure of oxygen work? |
Haemoglobin bind or dissociates to oxygen depending on the partial pressure in cells high partial pressure of O2 high affinity low pp low affinity |
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How does partial pressure of carbon dioxide work? |
High pp of co2 low affinity of o2 with haemoglobin Low pp of co2 high affinity of haemoglobin |
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What are the two types of haemoglobin? |
There are two factors that can affect haemoglobin High altitude:organisms haemoglobin living in high altitude have a higher affinity to oxygen this is good because air is 'thinner' at higher altitudes High metabolism:organisms have haemoglobin that dissociates to oxygen very easily this allows oxygen to be quickly supplied to muscle cells during respiration |
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Oxygen transport? |
there's is a high partial pressure of oxygen in cells in lungs so affinity will be high and haemoglobin will bond to oxygen however it gets to a point when oxygen finding it hard to bond to haemoglobin because there aren't any left at the curve will plateau S shape |
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What happens when a molecule binds to a protein? |
A conformational chance |
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What is the bohr effect? |
When pCo2 increases affinity of haemoglobin to oxygen decreases and the increased dissociation of oxygen caused a shift in the graph |
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What is the circulatory system? |
Its is a specialised system of organs and muscles responsible for transporting nutrients throughout the body and removing waste products |
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What are the 4 chambers? |
RA RV LA LV |
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Function of left ventricle |
Left atrium contracts and cause blood to flow into left ventricle and pressure in the ventricle now closes the atrioventricular valve to prevent blood from flowing back into atrium the Oblood will now be pushed into the aorta which will then carry the blood to the rest of the body and the semi lunar valve in the aorta will prevent blood from flowing back into the ventricle pressure is very high in artery and aorta |
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Cardic cycle |
Atrial contraction>ventricluar contraction>relaxation >repeat |
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What is the heart ? |
It is the centre of the CS It is the muscle that pumps bloods around the body Pumps DBloods into lungs and Oblood to the body |
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What are coronary arteries? |
The arteries that supply the heart itself with oxygenated blood for respiration because it is always contracting and relaxing |
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Function of the pulmonary artery and pulmonary vain |
Pulmonary vain:takes oxygenated blood from the lungs and transports it to the heart Pulmonary artery:takes deoxygenated blood from the heart to the lungs |
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What does the vena cava do? |
Vena cava transport deoxygenated blood that has dissociated from oxygen the and carries it back to the heart for the dbloods to then be pumped to the lungs |
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What does the aorta do? |
Aorta transports oxygenated blood from the heart to the rest of the body blood in aorta is high pressure so that blood gets to all the tissues of the body |
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Function of renal vain and artery |
Renal arteries transports oxygenated blood to the kidney cells so that they can absorb the oxygen and the renal vain takes the deoxygenated blood out of kidney |
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Function of right atrium |
This is the chamber that deoxygenated blood carried from the vena cava first enters |
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Function of right ventricle |
Walls of right atrium contact and Dblood then goes into the right ventricle the atrioventricular valves prevents blood from going back into the atrium walls of ventricle contact and dblood is pushed out of ventricle and into lung trough the pulmonary artery and semi lunar vale prevent blood from flowing back into the ventricle from pulmonary artery |
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Function of Left atrium |
Chamber when oxygenated blood from the lungs first enters which was being carried by the pulmonary vain |
