1.1 what is cardiovascular disease? and how does circulation work?
SNAB edexcel A2 biology topic 1:
- Created by: _lauren
- Created on: 01-01-15 18:41
Other questions in this quiz
2. what causes the pain of angina? (usually experienced during exertion)
- supply of blood to heart and brain is slightly interupted
- the heart lacking oxygen causes it to respire anaerobically, this results in chemical changes triggering the pain.
- a build up of fat deposits causes a blood clot which narrows the arteries and stops the right amount of blood circulating around the body
3. during ventricular systole, the pressure of blood against the atrioventricular valves does what?
- closes them
- opens them
- damages them
4. which is the correct order?
- atrial systole, diastole, ventricular systole
- atrial systole, ventricular systole, diastole
- diastole, ventricular systole, atrial systole
- ventricular systole, atrial systole, diastole
5. what happens when there is a plaque in an artery?
- blood flow speeds up and so pressure increase and the artery becomes more damaged
- the artery becomes narrower and positive feedback builds up, causing raised blood pressure.
- the artery narrows and blood flow slows down, decreasing blood pressure
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