Final answer:
The two types of metabolic rates are the Basal metabolic rate (BMR) and the Resting metabolic rate (RMR), with BMR being the minimum energy required for vital functions at complete rest and influenced by several body and environmental factors.
Step-by-step explanation:
There are two types of metabolic rates: the Basal metabolic rate (BMR) and the Resting metabolic rate (RMR). The BMR is the rate at which the body uses energy while at complete rest in a neutrally temperate environment, after the last meal. It is the minimum energy required to maintain vital body functions like heart rate, respiration, and kidney function. In contrast, the RMR is often used interchangeably with BMR but is slightly different as it is not measured under the same strict conditions, such as being measured under less controlled environments. It's important to note that metabolic rates can be influenced by factors such as age, gender, total body weight, and amount of muscle mass.