Exercise 2: Examine effect of carbon dioxide production on the pH of the blood and how exercise effects this process. 2. (a) Record the time it took for your solution to change from red/purple (alkaline pH) to orange (neutral pH) as a result of expiration into the water contained within the flask. [1 mark] Time in Seconds Before Exercise NO After Exercise 80 sec by m 20 45 sec g ANOT ANY Exercise 3: Examine the differences between healthy and diseased lungs. 3. (a) Looking at the pathology specimens of the diseased versus healthy lungs what differences do you observe? How do you think this may affect the functioning of the lungs? Try and suggest two functional impacts? [2 marks] Diseased lungs black spots between has thicker lines, patches of inflammation muscle loss this diaphragm muscle healthy lungs. Clean, pink colour smaller than diseased lungs dome shaped draphram... wasnt visible +not likely anyway 0.5 Neeel to discuss 2. Hragm the only muscle that affects the volume of the thoracic cavity and therefore breathing in the human lung? Consider normal and forced breathing. [1 mark] Diaphragm and external intercostal What about forced? Abs muscles. In exercise 2, you externally modelled what is normally happening within the blood stream during regular activity as well as during exertion, and monitored how this affected the pH of a solution (or your blood). Using the results of this experiment explain what happens to the pH of blood when CO2 and water combine, and hypothesise why you saw a different result in light of physical exertion. [3 marks] In the experiment, the cellular respirato + how needs 1. S time is reduced to Change cature colour of solution. The addition of co₂ decrease change the DISCUSS buffer equation 3. PH, and meaning in our body co decrease the pn of blood. With the light Physical exercise, make it makes us exerise, resulting US CO2 This may to breath more to breath than before out more amount of reduce the time take to chang in pH of Today you have observed some of the damage that smoking inflicts on the respiratory system. Is this damage reversible if an individual ceased smoking? You will need to consult alternate resources in order to accurately answer this question. [1 mark] Solution. The damage can be recovered, or reversible slowly