What problem exists when using the Harris-Benedict equation to ...

[azncindy619]

What problem exists when using the Harris-Benedict equation to calculate resting energy expenditure among patients with the same disease? I. This equation tends to overestimate resting energy expenditure (REE). II. The mean measured REE for mechanically ventilated patients can range from 70 to 140. III. The equation was developed among healthy volunteers. IV. Multiple calculations must be performed before a valid determination is made.
 
  A. I, III only
  B. II, IV only
  C. I, II, III only
  D. II, III, IV only

Question 2

When a patient's fixed rate of carbohydrate metabolism is exceeded, what happens to additional calories that are consumed? I. Gluconeogenesis occurs. II. Lipogenesis occurs. III. Glycolysis takes place. IV. Glycogenesis takes place.
 
  A. I only
  B. IV only
  C. II, IV only
  D. I, III only

[zoeyesther]

Answer to Question 1

ANS: B
A. Incorrect response: See explanation B.
B. Correct response: An inherent problem associated with using the Harris-Benedict equation for determining the resting energy expenditure (REE) is its tendency to underpredict the measured REE. Despite being developed using healthy volunteers, the Harris-Benedict equation remains useful. Patients receiving mechanical ventilation have been shown in one study to have a measured REE greater than 105 of predicted, ranging from 70 to 140 of predicted.
C. Incorrect response: See explanation B.
D. Incorrect response: See explanation B.

Answer to Question 2

ANS: C
A. Incorrect response: Gluconeogenesis is the generation of glucose from nonsugar carbon substrates, such as pyruvate, lactate, glycerol, and glucogenic amino acids.
B. Incorrect response: Glycogenesis is the process of glycogen synthesis, in which glucose molecules are added to chains of glycogen. This process is activated by insulin.
C. Correct response: The degree to which energy expenditure is increased is related to the degree to which the fixed rate of carbohydrate metabolism is exceeded. Once the fixed rate of carbohydrates is exceeded, additional calories must be converted to either glycogen (glycogenesis) or fat (lipogenesis). Lipogenesis is the process by which glucose is converted to fatty acids.
D. Incorrect response: See explanation C.

[azncindy619]

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[zoeyesther]

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