What is the body’s first source of energy when someone stops eating?, Ketones, Circulating glucose, Fat stores, Protein breakdown, After glucose is used, which stored fuel does the body rely on next?, Glycogen in the liver and muscles, Dietary fat, Muscle protein, Lactate, Which fuel source provides large amounts of ATP during prolonged fasting—but requires oxygen to be used?, Amino acids, Glucose, Fatty acids, Ketones only, When does the body begin breaking down protein for energy?, During a normal meal, During short periods of rest, During light exercise only, During prolonged starvation or severe illness, Why can prolonged stress (e.g., sepsis, trauma) disrupt metabolic flexibility?, The body stops using ATP, The pancreas stops producing insulin completely, Oxygen delivery increases excessively, Metabolic demand becomes so high that all fuel stores are used rapidly

Metabolic Flexibility

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