REVISION OUTLINES - Have you covered everything? The Revision Outlines will reveal

LIST OF TERMS - Can you define these terms? Or know how to use them? Or where they came from at all?

LAB HELP - No more scratching your head to write a Discussion. The Discussion Questions give you a bang start.



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Sunday, December 12, 2010

LAB HELP - BREATHING AND RESPIRATION - To demonstrate that yeast respires

 TOPIC: BREATHING AND RESPIRATION 

AIM: To demonstrate that yeast respires

APPARATUS/MATERIALS:
·         2 boiling tubes
·         bung
·         delivery tube
·         glucose solution
·         yeast

POSSIBLE DISCUSSION QUESTIONS:

BACKGROUND
1.       Define respiration
2.       Name the two types of respiration
3.       State that yeast respires both aerobically and anaerobically.
4.       Which type of respiration takes place in this experiment?  How do you know?
5.       Write a word/chemical equation to represent the type of respiration in yeast.
6.       Which enzyme catalyzes respiration in yeast?
7.       What is the standard laboratory test for carbon dioxide? (Equation?)
8.       Which set-up serves as a control?  What is the purpose does the control serve in this experiment?


EXPLANTION OF RESULTS
10.   Compare expected results with experimental results
11.   How would you determine that anaerobic respiration did not take place?
      


PRECAUTIONS/LIMITATIONS/SOURCES OF ERROR
12.   Why is it important to use fresh yeast?
13.   Is it advisable to breathe near the tube containing lime water?




Saturday, December 11, 2010

LIST OF TERMS - RESPIRATION - INTEGRATED SCIENCE

  1. 1.  aerobic respiration
    2.    air pressure increases/decreases
    3.    alcoholic fermentation
    4.    alveolar fluid
    5.    alveoli
    6.    anaerobic respiration
    7.    asthma
    8.    blood supply
    9.    bronchi
    10. bronchiole
    11. bronchitis
    12. bronchus
    13. capillaries
    14. carbon dioxide
    15. chemical breakdown
    16. cilia
    17. concentration gradient
    18. cytoplasm
    19. diaphragm
    20. diffuse
    21. dissolve
    22. dome-shaped
    23. emphysema
    24. energy
    25. ethanol/alcohol
    26. exhale/expire
    27. external intercostals
    28. gill
    29. gill rakers
    30. gills
    31. glucose
    32. incomplete rings of cartilage
    33. inhale/inspire
    34. internal intercostals
    35. joules
    36. lactic acid
    37. lamellae/filaments
    38. larynx
    39. lime water/aqueous calcium hydroxide
    40. lung cancer
    41. milky white
    42. mitochondria
    43. mouth
    44. mucociliary escalator
    45. mucous
    46. mucus
    47. muscle
    48. nasal cavity
    49. nitrogen
    50. noble gases
    51. nose
    52. oesophagus
    53. operculum
    54. oxygen
    55. pharynx
    56. photosynthesis
    57. pneumonia
    58. products
    59. rapid diffusion
    60. respiration
    61. respiratory surface
    62. stomata
    63. substrate
    64. surface area
    65. ventilation
    66. vigorous exercise
    67. volume of thorax/thoracic cavity/chest cavity
    68. waft
    69. waste product
    70. water vapour
    71. yeast
    72. y-tube

REVISION OUTLINE - RESPIRATION - INTEGRATED SCIENCE

1.    Define Aerobic Respiration
1.1.    word equation 

2.    Define Anaerobic Respiration
2.1.   word equation
2.1.1.   muscle
2.1.2.   yeast

3.    State ( industrial) applications of anaerobic respiration
3.1.   Breadmaking
3.2.   Brewing
3.3.   Yoghurt, cheese, sour cream
3.4.   Etc.

4.    Distinguish between aerobic and anaerobic respiration
4.1.   Site of reaction
4.2.   Oxygen requirement
4.3.    in/complete breakdown of glucose
4.4.   products
4.5.   Amount of energy produced

5.   Describe experiment to show that living things respire

6.    Understand that in plants, products of photosynthesis are substrates of respiration
6.1.   Surplus of oxygen during day
6.2.   Surplus of  carbon dioxide during night

BREATHING

7.    Define Breathing

8.    Distinguish between breathing and respiration

9.    Describe the mechanism of breathing in humans
9.1.   Inspiration/Inhalation
9.2.   Expiration/Exhalation

10. Draw analogy between bell-jar model and human respiratory system ( bell jar, bung, Y-shaped tube,  2 balloons, rubber sheet)

11. Compare composition of inhaled air and exhaled air
11.1. Oxygen
11.2. Carbon dioxide
11.3. Nitrogen a
11.4. Noble gases
11.5. Water vapour
11.6. Heat

12. Describe the structure and function of the human respiratory system
12.1. Nose, mouth, trachea, larynx, rings of cartilage, bronchi (left bronchus and right bronchus), bronchioles, alveoli, pleural membrane, pleural fluid, pleural cavity, diaphragm, ribs, internal and external intercostal muscles)

13. Respiratory Problems due environmental pollution
13.1. Asthma
13.2. Bronchitis
13.3. Emphysema
13.4. Lung Cancer


GASEOUS EXCHANGE

14. Define gaseous exchange

15. State the characteristics common to gaseous exchange surfaces
15.1. Large surface area
15.2. Thin surface for rapid diffusion
15.3. Moist surface
15.3. Maintenance of concentration gradients 

16. Describe gaseous exchange in the alveoli
16.1. Labelled diagram required
16.2. Adaptations of the alveoli for gaseous exchange

17. Describe breathing mechanism in fish

18. Describe gaseous exchange in gills
18.1. Labelled diagram insightful
18.2. Adaptations of the gills for gaseous exchange

 a.    Some texts show a lower percentage composition of nitrogen in expired air, suggesting that some nitrogen is used. This is not the case.  The actual nitrogen content remains the same. However, since extra water vapour in expired air adds volume to total expired air, then the percentage composition of nitrogen works out to be less.