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Terms in this set (15)
re-distribution of blood, a decrease of blood from the vital organs and an increase to working muscles
What is the vascular shunt mechanism?
Would cause more blood to go to the gut for digestion so less would be available to go to the working muscles
Why should an athlete not eat 1hr before competition
97% binds with haemoglobin
3% dissolves into plasma
How is oxygen transported in the blood?
20 mins into exercise we begin to sweat, this causes blood to become viscous, leading our stroke volume to decrease, our HR increases to maintain CO
What is cardiovascular drift
Increased VR 🡪 Increased diastolic filling of the heart 🡪 cardiac muscle stretched 🡪 more force of contraction 🡪 increased ejection fraction.
What is Starling's Law?
CO2 produced during cellular respiration lowers blood pH and decreases the affinity of hemoglobin for O2
What is the Bohr shift?
Increased blood temp
PP of Co2 increases
Lower pH (🡩 Co2)
What 3 factors are responsible for the increase in dissociation of oxygen from haemoglobin which results in more oxygen being made available for the working muscles?
Low density lipoprotein - Transport cholesterol in the blood to the tissues
High density lipoprotein - Transport excess cholesterol in the blood back to the liver where it is broken down
Describe the 2 types of cholesterol?
ischemic - blood clot stop blood supply to the brain
hemorrhagic - weakened blood vessel supplying blood to the brain bursts.
What are the 2 types of stroke?
detect movement/ muscle contraction
found in muscles and tendons
What does the proprioceptor do?
Detect chemical change in the blood (increase in c02 levels)
What do chemoreceptors do?
detect changes in blood pressure
What do baroreceptors do?
Pulmonary - Deoxygenated blood from the heart to the lungs and oxygenated blood back to the heart.
Systemic - Oxygenated blood to the body from the heart, deoxygenated blood from the body to the heart
What are the 2 types of cirulation
A fatty deposit found in the inner lining of an artery.
What is atheroma?
An increased venous pressure
A decreased right atrial pressure
A decrease in venous resistance
What 3 factors can cause an increase in venous return
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