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6. Which type of blood vessel has thick walls containing muscle and elastic tissue?
- veins
- arteries
- capillaries
7. Which of these is NOT a method to treat Type 1 diabetes (when the pancreas produces little or no insulin)?
- using adult stem cells/embryonic stem cells/genetically engineered pancreas cells
- Injections of insulin (produced by genetically engineered bacteria
- careful attention to diet
- controlling the blood glucose levels with hormones
- Transplanting pancreas cells
8. which type of blood vessel are narrow, thin walled and allow the exchange of substances with body cells?
- the capillaries
- the veins
- the arteries
9. Which type of blood vessel has thin walls, a large lumen and valves to prevent backflow?
- the veins
- the capillaries
- the artereis
10. What is the transpiration stream?
- the loss of water vapour from the plant
- the diffusion of gases
- the movement of water through the plant
- the uptake of water through the roots
11. How does gas diffuse in and out of leaves?
- by transpiration
- through tiny holes called stomata
- through the guard cells
- through root hair cells
12. What are white blood cells?
- fragments of cells which clot at the site of the wound
- part of the body's defence system to fight microoganisms
- bio-concave discs, with no nucleus, with carry oxyhaemoglobin
- fluid to transport cells, and other substances such as solutes, urea and CO2
13. which type of sports drink matches the body fluids?
- hypertonic
- isotonic
- hyptonic
14. What is urea?
- breakdown of amino acids, produced by the kidneys
- the breakdown of amino acids, made in the liver
- useful substances in the patients blood ie, glucose and mineral ions
- soluble products of digestion
15. Which of these is NOT a key feature of a good exchange surface?
- Aveoli are surround by capillaries
- a good blood supply
- thin walls or membrane for a short diffusion path
- large surface area to volume ratio
16. Sports drinks contain water to...
- make the cells work efficiently
- replace water lost when sweating and rehydrate body cells
- to replace mineral ions lost when sweating
- to replace sugar used for energy release
17. What are stents used for?
- to increase blood volume
- to replace the heart
- to keeps blood vessels, eg. the coronary arteries if they have become blocked due to fatty deposits
- the replace damaged valves to prevent backflow
18. What are platelets?
- bio-concave discs, with no nucleus, with carry oxyhaemoglobin
- part of the body's defence system to fight microoganisms
- fragments of cells which clot at the site of the wound
- fluid to transport cells, and other substances such as solutes, urea and CO2
19. Which of these does NOT happen when we breathe in?
- the diaphragm flattens
- the volume of the thorax increases
- the ribcage moves up and out
- the pressure in the chest increase
- the intercostal muscles contract
20. Which of these is NOT a feature of dialysis?
- Immunosuppressants have to be taken to stop the body rejecting proteins on the surface of kidney, called antignes
- the dialysis fluid contains the same amount of useful substances, so that only urea diffuses out
- restores the concentration of substance in the blood
- needs to carried out at regular intervals for long periods oof time