9. Muscle glycogen cannot contribute directly to blood glucose levels because (A) muscle glycogen cannot be converted to glucose 6-phosphate. (B) muscle lacks phosphoglucoisomerase. (C) muscle contains no glucokinase. (D) muscle contains no glycogen phosphorylase. (E) muscle lacks glucose 6-phosphatase.

9. Muscle glycogen cannot contribute directly to blood glucose levels because
(A) muscle glycogen cannot be converted to glucose 6-phosphate.
(B) muscle lacks phosphoglucoisomerase.
(C) muscle contains no glucokinase.
(D) muscle contains no glycogen phosphorylase.
(E) muscle lacks glucose 6-phosphatase.

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1. 題目解析這道題目考察的是肌肉糖原...

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6. When a muscle is stimulated to contract aerobically, less lactic acid is formed than when it contracts anaerobically because: (A) glycolysis does not occur to significant extent under aerobic conditions. (B) muscle is metabolically less active under aerobic than anaerobic conditions. (C) the lactic acid generated is rapidly incorporated into lipids under aerobic conditions. (D) under aerobic conditions in muscle, the major energy-yielding pathway is the pentose phosphate pathway, which does not produce lactate. (E) under aerobic conditions, most of the pyruvate generated as a result of glycolysis is oxidized by the citric acid cycle rather than reduced to lactate.

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