A 22-year-old man with type 1 diabetes mellitus is found confused and diaphoretic after skipping dinner. In the emergency department, his capillary glucose is 38 mg/dL. He is treated with an intramuscular medication because intravenous access is temporarily unavailable. Within minutes, his mental status improves and his serum glucose begins to rise. Which of the following best describes the primary metabolic actions of this medication on its main target tissues?