Shortcut Methods
Shortcut Methods and Tricks for Respiration Numericals
- Rate of Respiration:
- The rate of respiration can be estimated using the Michaelis-Menten equation: $$\frac{V_0}{V_{max}}=\frac{S}{K_m+S}$$ where V0 is the rate of reaction, Vmax is the maximum rate of reaction, S is the substrate concentration, and Km is the Michaelis-Menten constant.
- Respiratory Quotient (RQ):
- The RQ can be calculated using the formula: $$RQ=\frac{\text{Volume of carbon dioxide produced}}{\text{Volume of oxygen consumed}}$$
- The RQ can also be estimated using the following table:
| Substrate | RQ |
|---|---|
| Glucose | 1.0 |
| Fats | < 1.0 |
| Proteins | > 1.0 |
- Caloric Value of Food:
- The caloric value of food can be estimated using the formula: $$H=\Sigma(qP)$$ where H is the caloric value of food, q is the caloric value per gram of food, and P is the weight of the food in grams.
- Basal Metabolic Rate (BMR):
- The BMR can be estimated using the following formula for men: $$BMR=66.5+(13.8×W)+(5×H)-(6.8×A)$$
- The BMR can be estimated using the following formula for women: $$BMR=655+(9.6×W)+(1.8×H)-(4.7×A)$$ where W is the weight in kilograms, H is the height in centimeters, and A is the age in years.
- Respiratory Efficiency:
- The respiratory efficiency can be calculated using the formula: $$\eta=\frac{\text{Energy obtained from glucose metabolism}}{\text{Total energy available for metabolism}}\times100$$
- The respiratory efficiency can also be estimated using the following table:
| Substrate | Respiratory Efficiency |
|---|---|
| Glucose | 40% |
| Fats | 60% |
| Proteins | 50% |
