Final answer:
The resting level of oxygen consumption, known as one metabolic equivalent, is referred to as 1.0 MET, representing the amount of oxygen the body uses at rest.
Step-by-step explanation:
The resting level of oxygen consumption, which is a measure of the energy used by the body at rest, is referred to as one metabolic equivalent, or 1 MET. This term is used to describe the metabolic rate and is equivalent to the amount of oxygen consumed while sitting at rest, which for a typical adult is roughly 3.5 milliliters of oxygen per kilogram of body weight per minute (mL/kg/min). When we measure the basal metabolic rate (BMR), it's essentially the amount of energy expanded while at rest in a neutrally temperate environment, after the digestive system has been inactive for about 12 hours. Therefore, the correct answer to the question is 1.0 MET.