Page 332 - Biology_F5

Gas exchange and respiration

Solution: Solution:

Volume of CO evolved Volume of CO evolved
RQ = 2 RQ = 2
Volume of O consumed Volume of O consumed
2 2
102O Since the process is anaerobic, the volume
RQ = 2 = 0.7
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145O 2 of oxygen evolved is zero.
So, the RQ value for tripalmitin is 0.7 Thus:

2CO 2
(b) What is the RQ when glucose is RQ = 0O 2 = ∞ (Infinity)
respired anaerobically to ethanol and
carbondioxide?

Table 6.5: RQ values for carbohydrates, lipids and proteins
Respiratory substrate Respiratory quotient Type of metabolism
Carbohydrates 1 Aerobic respiration

Lipids 0.7 - 0.72 Aerobic respiration

Proteins 0.8 - 0.9 Aerobic respiration
Carbohydrates or lipids or proteins ∞ Anaerobic respiration

Revision exercise 6 tight-windows in Makete district.
A charcoal stove that was still
1. How are the lungs adapted to their burning, was found inside the room,
functions? which was apparently brought in
2. What is the role of the mucus to provide warmth during that cold
secreted by the epithelium lining season. What could be the possible
of the nasal passage? reasons for the incidence? Provide
3. Describe the internal structure of the recommendations on how to
the mammalian lungs. avoid such incidences.

4. Explain the mechanism of carbon 6. Describe the stages involved in
dioxide transport in the mammalian glycolysis.
blood.
5. One morning, an old man and his 7. Describe the fate of pyruvic acid
under aerobic and anaerobic
two grandsons were found dead respiration.
and one grandson was found
unconcious inside a room with air- 8. Explain the events in the electron

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