1.1 what is cardiovascular disease? and how does circulation work?

SNAB edexcel A2 biology topic 1:

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  • Created by: _lauren
  • Created on: 01-01-15 18:41

1. what changes occur when there is direct contact of blood with collagen in damaged artey wall?

  • 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
  • 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.
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Other questions in this quiz

2. what does it mean if something is a polar molecule

  • it has an unevenly distributed electrical charge
  • it has an evenly distributed electrical charge
  • it consists of a giant lattice of oppositely charged ions

3. in atherosclerosis, what blocks an artery? (or increases it's chance of being blocked by a blood clot)

  • cholesterol
  • fatty deposits
  • build up of insoluble molecules
  • white blood cells

4. collagen is ...

  • a tough fibrous protein found in both arteries and veins
  • a tough fibrous protein found only in arteries
  • a tough fibrous protein found only in veins

5. what happens in a heart attack?

  • 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
  • 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.

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