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
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2. (in atherosclerosis) once the endothelium is damaged, white blood cells move into artery wall and accumulate what? and what is the deposit that builds up called?
- a) water molecules b) atheroma
- a) c02 b) atheroscleroma
- a) cholesterol b) atheroma
- a) cholesterol b) a blood clot
3. the blood is supplied to the heart though two vessels called the...?
- coronary arteries
- the pulmonary arteries
- the pulmonary veins
4. 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
5. what changes occur when there is direct contact of blood with collagen in damaged artey wall?
- soluble plasma protein fibrinogen --> fibrin which is an enzyme that catalyses soluble plasma protein prothrombin --> long insoluble strands of thrombin. these strands form a tangled mesh, traps blood cells, forms clot.
- soluble plasma protein prothrombin --> thrombin which is an enzyme that catalyses soluble plasma protein fibrinogen --> long insoluble strands of fibrin. these strands form a tangled mesh, traps blood cells, forms clot.
- insoluble protein prothrombin --> enzyme thrombin, catalyses fibrin --> long insoluble strands of fibrinogen which forms a tangled mesh that traps blood cells forming a clot
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