..UJiaN ToPikAL / PePERiKSaAN

Chapter 7 : Respirations

STRUCTURED QUESTIONS

1. X : C6 H12 O6 + 6 O2 --------------------->6 CO2 + 6 H2O + Energy


Y : C6 H12 O6 2 C2 H5 OH + 2 CO2 + Energy


The equation X and Y above shows the reaction that occurs in the respiratory process.

a) State the type of respiration represented by equation

i) X: …………………………………………

ii) Y:………………………………………….

b) i) Define the process X

………………………………………………………………………………………

………………………………………………………………………………………

ii) Define the process Y

………………………………………………………………………………………
………………………………………………………………………………………

c) Anaerobic respiration yields less energy compared with aerobic respiration. State the reason for this.

………………………………………………………………………………………
……………………………………………………………………………………
………………………………………………………………………………………
d) A person who does strenuous exercise experiences “ oxygen debt”. Explain what is meant by “ oxygen debt”.
……………………………………………………………………………………...
………………………………………………………………………………………

e) Write an equation for (d).
………………………………………………………………………………………

7.3 : Gaseous Exchange







The diagram above shows the gaseous exchange in the lung and tissues.



1. Name the structure X.



  ________________________________________________________________________





2. Compare the concentration of oxygen in structure X with the concentration of oxygen in the blood.



________________________________________________________________________





3. State two characteristics of structure X that allows it to function efficiently.



a) _____________________________________________________________________



b) _____________________________________________________________________





4. Name gas A and gas B.

 

    Gas A : ______________________________________________________________



    Gas B : ______________________________________________________________









5. Name the process involve in the gaseous exchange.



______________________________________________________________________





6. Name the substance in the red blood cell that carries oxygen.



_______________________________________________________________________





7. When gas A unites with a red blood cell, an unstable compound is formed. Name the compound.



________________________________________________________________________







8. State the three forms of gas B as it is transported in the blood vessel.



a) _____________________________________________________________________



b) _____________________________________________________________________



c) _____________________________________________________________________   





9. In what form is carbon dioxide mainly carried in the blood?



______________________________________________________________________





10. Compare the partial pressure of oxygen in the alveolus to the partial pressure of oxygen in the blood capillaries.



________________________________________________________________________


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1. The ozone layer in the stratosphere is important to the living organisms on earth because

A
It filters the ultraviolet rays
B
It filters the infrared rays
C
It absorbs CFCs
D
It decreases the concentration of carbon dioxide

2. What contributes to the greenhouse effects ?

A
The absorption of sunlightand subsequent change into heat energy
B
The gas released during the burning of fossil fuels traps the infrared rays
C
The generation of heat energy by tall building in cities
D
The spraying of insecticides on crops plant



3. What contributes to the increase in the concentration of carbon dioxide in the atmosphere ?



I
The burning of fossil fuel
II
Forest fires
III
Deforestation
IV
Open burning



A
I, II and III only
B
I, III and IV only
C
II, III and IV only
D
I, II, III and IV



4. Sustainable and planned forest managemant projects include

I
The establishment of a level of selective harvesting
II
The creation of forest reserve
III
The repanting trees
IV
Controlled clearing of trees for cultivation of crops



A
I, II and III only
B
I, III and IV only
C
II, III and IV only
D
I, II, III and IV



5. What examples of technology used to control and protects the environment ?



I
The used of solar powered devices
II
The use of electric vehicles
III
The use of microorganism to clean the environment
IV
The use of light aircraft to spray insecticides



A
I and III only
B
II and IV only
C
I, II and III only
D
II, III and IV only





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