1. what happens in a heart attack?
- a fatty deposit builds up inside a chamber in the heart, this stops blood from being pumped through the heart and the heart is oxygen deprived. this means it cannot continue pumping blood to the body and starts to beat irregularly.
- a fatty plaque in the coronary arteries ruptures and cholesterol is released which leads to rapid clot formation. the blood supply to heart is blocked completely. affected muscle cells oxygen deprived for long time = permanent damage
- a platelet plug is formed and blood carrying oxygen is unable to be transported around to the heart, the heart is without blood (ischaemic) and is unable to work any more
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Other questions in this quiz
2. what is the pain of the narrowing of coronary arteries called? (it limits the amount of oxygen-rich blood reaching the heart muscle)
- coronary heart disease
3. elastic fibres allow arteries and veins to...
- stretch and recoil
- constrict and dilate
- not be damaged when the blood flowing though them is of a high pressure
4. water is what type of molecule?
5. during atrial systole, as the atria fill the pressure of blood against the ........ pushes them open
- atrioventricular vavles
- semilunar valves
- bicuspid valves