What does it indicate if RQ in humans is : i) near 0.7 ii) near 0.1 iii) between 0.7-1.0
Answers
Dear Student,
● Answer -
i) RQ near 0.7 indicate fats.
ii) RQ near 1 indicates carbohydrate.
iii) RQ between 0.7-1.0 indicates proteins.
◆ Respiratory quotient -
- It is ratio of carbon dioxide produced to oxygen consumed during cellular respiration of food.
● Significance of respiratory quotient -
- It depends on type of food substrate and type of respiration.
- RQ for carbohydrates is 1.
- RQ for fats is about 0.7.
- RQ for proteins is about 0.5-0.9.
- RQ for green leafy vegetables is zero.
- RQ for anaerobic respiration is infinity.
Thanks dear...
RQ values given indicates that:
i) Near 0.7 value indicates lipids are being used as energy source.
ii) Near 0.1 value is not seen generally.
iii) The metabolism of lipid, protein and carbohydrate is taking place when value of RQ is between 0.7 to 1.
Explanation:
RQ symbolizes Respiratory Quotient. It is the ratio of carbon dioxide released and oxygen used up in respiration.
A instrument called respirometer is used to measure this value.
For the process of respiration in human the substrate required is glucose and oxygen. Glucose is the source of energy derived from food. Carbohydrate is instant source of energy while fats and proteins comes later when carbohydrate gets scarce.
The energy contribution from protein or fat source requires additional steps hence have lesser respiratory quotient than carbohydrates. These additional steps require oxygen hence RQ gets lower.
the value of 0.7 tells that lipid or fat is used as an energy source.
the value of 0.1 is not seen in common.
the value between 0.7 to 1 indicates that source of energy is by fat, protein or carbohydrate because fat has RQ of 0.7, protein has RQ of 0.8 and carbohydrate has RQ of 1 and is a mixed diet.
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