Q. A researcher is conducting a study in her lab on the metabolic pathways influenced by glucagon. She has chosen to focus on skeletal muscle tissues, examining the specific enzymatic activities related to glycogen metabolism when exposed to glucagon. After performing a series of experiments and analyzing the data, she notices a particular pattern regarding glycogen turnover in muscle cells in the presence of glucagon. Based on the role of glucagon in muscle glycogen metabolism, which of the following findings would the researcher most likely observe?