Chapter 10 respiration II
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Chapter 10 respiration II
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Chapter 10 respiration II
- 1. RESPIRATION
- 2. R U Ready???
- 3. ∗ By the end of the lesson, students should be able to: ∗ describe the effect of lactic acid in muscles during exercise. ∗ describe the effect of tobacco smoke and its major toxic components – nicotine, tar and carbon monoxide, on health. Lesson Objectives
- 4. 1)What are 3 differences between aerobic respiration and anaerobic respiration in the human body? a) release of different amounts of energy b) availability of oxygen c) products formed Quick Recap!
- 5. Quick Recap! 2)Which part of the human body can carry out both aerobic respiration and anaerobic respiration? skeletal muscles
- 6. ∗ When a person is exercising vigorously, muscle cells need A LOT OF ENERGY. ∗ Even though we breathe faster and deeper than usual, the muscle cells are not able to receive oxygen fast enough to meet the demand for aerobic respiration. ∗ What happens then is that the muscle cells respire anaerobically to release even more energy. Why carry out anaerobic respiration?
- 7. ∗Lactic acid is produced. ∗Lactic acid accumulated in the muscles cause fatigue – muscular pains decrease performance. ∗Lactic acid must be removed. ∗This requires oxygen, thus the body is said to have incurred an oxygen debt. So what happens when there is anaerobic respiration?
- 8. ∗Lactic acid is transported to liver. ∗Oxidized to produce energy to convert remaining lactic acid to glucose. ∗Glucose can be stored or used in aerobic respiration. How does the body remove lactic acid?
- 9. ∗Subject A ∗ Her face looks sickly pale, but she is full of energy! ∗ She walked the entire X-country.
- 10. ∗ Subject B ∗ This tall, dark and handsome boy has been running at a comfortable pace for 5 min. ∗ Actually… Just slightly faster than subject A.
- 11. ∗Subject C ∗ Crazy-looking kid who has been running at full speed throughout the X-country!
- 13. ∗Subject C ∗ Truth is… he saw a cockroach and was running away...
- 14. ∗Tabacco smoke ∗Haze ∗Respiratory diseases ∗ E.g. chronic bronchitis, emphysema What can harm a person’s respiratory system?
- 15. ∗ Groups of 4! ∗ A table will be given to organize the data in the envelopes. ∗ Properties of the chemicals (red colour) ∗ Effects on body (blue colour) ∗ Example: Activity Time!
- 16. ∗You will be given 10 minutes to complete the task! ∗The fastest group with all correct answers gets a prize! Activity Time!
- 17. Harmful Substances in Cigarette Smoke
- 19. ∗Due to prolonged breathing of irritants Chronic bronchitis
- 21. Function of Cilia ∗Form a lining on the thin epithelium lining ∗Cilia helps to sweep dust particles and bacteria up the bronchioles, to the bronchi, and to the trachea into the pharynx to get swallowed into the oesophagus
- 22. ∗ Inflammation of trachea, bronchi, bronchioles (airways) ∗ Cilia along the epithelium lining being paralysed. ∗ Irritants are trapped in the mucus lining the airways. ∗ Airways become blocked, making breathing difficult. ∗ Persistent coughing, in order to clear airways. ∗ This also leads to an increased risk of getting lung infections. Chronic bronchitis
- 23. ∗Due to persistent and violent coughing Emphysema
- 24. 1. Violent coughing breaks the partition walls between the alveoli ∗ Surface area for gaseous exchange will decrease Emphysema
- 25. 2. Lungs also lose their elasticity ∗ Air is trapped in the lungs Emphysema
- 26. 3. Breathing becomes difficult ∗ Person will wheeze and suffer from severe breathlessness Emphysema
- 27. ∗ This person is suffering from COPD! ∗ Chronic Obstructive Pulmonary Disease lah! What happens when a person suffers BOTH chronic bronchitis and emphysema?
- 28. Stay healthy and stay away from ! ∗And you will be smiling like them everyday! Smile like a retard! Smile like Joker!
Editor's Notes
- Anaerobic respiration in muscle cells cannot be sustained for long.
- During a period of rest, the body cells oxidise all the lactic acid thus ‘ repaying ’ the ‘ debt ’ and relieving the pain.
- To help you all learn better by using real life situations, I thought we will make use of very real life situations: your own classmates during the cross country! So we start off with subject A: a person who is walking slowly Subject B: a person who is running for 3-5min Subject C: a person who ran continuously for 20min and is sprinting towards the finishing line!
- Let’s take a look at all 3 subjects. So which subject do you think has the least aerobic respiration taking place in his/her body? Who do you think has the most aerobic respiration and also respiring anaerobically?
- Now that we know the two different types of respiration, and when each type occurs, I hope everyone in the class today appreciates better how important our body’s respiratory system is. The next thing we are going to learn is: what do you think can harm a person’s respiratory system? I’m sure we all know one of the more prominent thing is cigarette smoke. But is there any other environmental conditions which may cause us hamr too ? Correct! Recently, Singapore has been hit by very bad haze conditions. Haze can also harm our respiratory system.
- Let’s take a look at this diagram now. It shows us some harmful substances in cigarette smoke and their effects. There are 4 main components. Lets take a look at each of them in greater detail. There is nicotine, tar, carbon monoxide gas and irritants.