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!