Standard Metabolic Rate (SMR)and Basal Metabolic Rate (BMR)are

Question

Standard metabolic rate (SMR)and basal metabolic rate (BMR)are
A) used differently: SMR is measured during exercise, whereas BMR is measured at rest.
B) used to compare metabolic rate between hibernating and nonhibernating states.
C) both measured across a wide range of temperatures for a given species.
D) both standard measurements of fat metabolism in mammals.
E) both measured in animals in a resting and fasting state.

Accepted Answer

Both SMR and BMR are measured in animals in a resting and fasting state, and are used to estimate the minimum amount of energy required to sustain basic physiological functions. SMR is measured at a standard temperature, whereas BMR is measured at thermoneutrality, but both are used to compare the metabolic rates of different species. Neither SMR nor BMR are measured during exercise (A), and while they can be used to compare hibernating and nonhibernating states, this is not their primary purpose (B). While both measurements may be taken across a range of temperatures, this is not unique to either measurement, and is not their primary purpose (C). Neither SMR nor BMR are specific to the measurement of fat metabolism, which is only one component of overall metabolic rate (D).