topic 8

Question 1

the alveoli from the person with emphysema have a what surface area than a healthy lung?

Answer 1

smaller

Question 2

the suface area of the alveoli will affect how much oxygen moves into the blood by the process of what?

Answer 2

diffusion

Question 3

explain how the structure of a blood vessel realted to its function?

Answer 3

the blood vessel has thick walls. They carry oxygenated blood to carry blood under higher pressure.

Question 4

what does the right ventricle do?

Answer 4

pumps deoxygenated blood to the lungs

Question 5

one reason why the left ventricle is thicker than the right?

Answer 5

to pump blood around the body at a higher pressure

Question 6

descibe what would happen to the flow blood in the left side of the heart if the bicuspid valve did not function effectively?

Answer 6

blood would flow backwards from the ventricle to the utruim. This means less blood would be pumped to the body.

Question 7

where does gas exchange take place in the lungs?

Answer 7

alveolus

Question 8

explain how emphysema would affect the amount of oxygen carried in the bloodstream?

Answer 8

it reduces the amount of oxygen carried to the bloodstream because there is reduced alveoli which are the gas exchange surface between the lungs and blood capillaries.

Question 9

give one reason why it is important that human lungs have a high surface area to volume ratio?

Answer 9

to maximise gas exchange.

Question 10

equation for aerobic respiration?

Answer 10

glucose + oxygen -] carbon dioxide + water