This is the link from the picture https://www.youtube.com/watch?v=69R0E_Rg_mQ 1 2 3 451. 6SBI3C:Case Study- Smoking and Lung Cancer/16Cancer usually begins in the bronchi or bronchioles. Components of cigarette smokecontribute to the development of cancerous tumours. Study the four diagrams below,which show the development and progression of lung cancer.Listen to the video about the effects of smoking in our lungs using the link below.https://www.youtube.com/watch?v=69ROE_Rg_mQcancer censbasal gobletcells cellsmucus cilia(a) normal(b) cancer developstumourthin mucous layernarrow bronchioles(c) cancer advances(d) tumour spreads1. Cigarette smoke travels through the bronchi and irritates the cells. Goblet cells producemucus, which is designed to trap foreign particles. Compare the mucous layers indiagrams A and B.a) How has cigarette smoke affect the mucous layer?2 Ciliated cells line the bronchi. Cilia sweep away the debris trapped by the mucus.Unfortunately, the tar found in cigarette smoke slows the action of the cilia. The sludge-liketar becomes trapped in the mucus.b) Why does the build-up of tar in the bronchi limit air flow?3 Diagram B shows the beginning of a cancerous tumour.c) In what area does the tumour begin to develop?4 Diagram C shows how the tumour begins to grow.d) Why has the mucous layer in diagram C decreased in size?7.. DClass XAmjo XGrou XLiteraE amjd XChttps://docs.google.com/docum... A to5 While the cancerous tumour is still walled in by the basal membrane in diagram C, thetumour breaks through the membrane in diagram D. At this stage, the tumour may spreadto other parts of the body. Cancer cells often use lymph vessels as pathways to other partsof the body, where they continue to divide.e) Why does this characteristic make cancer especially dangerous?Case-Study Application Questions.1 Based on the information that you gained in the case study, explain why smokers are oftenplagued by a cough.2 Why is the slowing of the cilia lining the bronchi especially dangerous?3 Survey different smokers and find out how many cigarettes they smoke in one day. Mostcigarettes contain about 15 mg of tar, but it should be noted that only 75% of the tar isabsorbed. Calculate the amount of tar taken in each day. Show your calculations.4. Nicotine, one of the components of cigarettes, slows cilia" lining the respiratory tract,causes blood vessels to constrict, and increases heart rate. Another component of cigarettesmoke is carbon monoxide. As you have read, carbon monoxide competes with oxygen forbinding sites on the hemoglobin molecule found in red blood cells. Analyse the datapresented, and describe the potential dangers associated with smoking.

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This is the link from the picture https://www.youtube.com/watch?v=69R0E_Rg_mQ 1 2 3 451. 6SBI3C:Case Study- Smoking and Lung Cancer/16Cancer usually begins in the bronchi or bronchioles. Components of cigarette smokecontribute to the development of cancerous tumours. Study the four diagrams below,which show the development and progression of lung cancer.Listen to the video about the effects of smoking in our lungs using the link below.https://www.youtube.com/watch?v=69ROE_Rg_mQcancer censbasal gobletcells cellsmucus cilia(a) normal(b) cancer developstumourthin mucous layernarrow bronchioles(c) cancer advances(d) tumour spreads1. Cigarette smoke travels through the bronchi and irritates the cells. Goblet cells producemucus, which is designed to trap foreign particles. Compare the mucous layers indiagrams A and B.a) How has cigarette smoke affect the mucous layer?2 Ciliated cells line the bronchi. Cilia sweep away the debris trapped by the mucus.Unfortunately, the tar found in cigarette smoke slows the action of the cilia. The sludge-liketar becomes trapped in the mucus.b) Why does the build-up of tar in the bronchi limit air flow?3 Diagram B shows the beginning of a cancerous tumour.c) In what area does the tumour begin to develop?4 Diagram C shows how the tumour begins to grow.d) Why has the mucous layer in diagram C decreased in size?7.. DClass XAmjo XGrou XLiteraE amjd XChttps://docs.google.com/docum... A to5 While the cancerous tumour is still walled in by the basal membrane in diagram C, thetumour breaks through the membrane in diagram D. At this stage, the tumour may spreadto other parts of the body. Cancer cells often use lymph vessels as pathways to other partsof the body, where they continue to divide.e) Why does this characteristic make cancer especially dangerous?Case-Study Application Questions.1 Based on the information that you gained in the case study, explain why smokers are oftenplagued by a cough.2 Why is the slowing of the cilia lining the bronchi especially dangerous?3 Survey different smokers and find out how many cigarettes they smoke in one day. Mostcigarettes contain about 15 mg of tar, but it should be noted that only 75% of the tar isabsorbed. Calculate the amount of tar taken in each day. Show your calculations.4. Nicotine, one of the components of cigarettes, slows cilia&#34; lining the respiratory tract,causes blood vessels to constrict, and increases heart rate. Another component of cigarettesmoke is carbon monoxide. As you have read, carbon monoxide competes with oxygen forbinding sites on the hemoglobin molecule found in red blood cells. Analyse the datapresented, and describe the potential dangers associated with smoking.

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