14. Blood glucose levels decrease between meals. How is the liver able to increase blood glucose levels in order to maintain blood glucose homeostasis? a. Liver cells contain a specific enzyme (glucose-6- phosphatase) that removes phosphate from glucose-6- Phosphate resulting in a glucose concentration gradient allowing the glucose to diffuse out of the hepatocytes and into the blood. b. The liver uses active transports to transport glucose into the blood c. The liver uses simple diffusion to transport glucose into the blood 15. During high intensity exercises, which substrate is metabolized anaerobically? a. Glucose b. Triglycerides c. Protein 16. The production of glycogen from glucose is called: a. Glycogenesis b. Glycogenolysis c. Gluconeogenesis 17. Which metabolic pathway produces most ATP? a. The oxidation of one molecule of glucose b. The anaerobic metabolism of one molecule of glucose c. The oxidation of a Triglyceride with each fatty acid contain 24 carbons 18. The pumping of protons by the electron transport chain ___________ a. Produces water b. Is a form of passive cell membrane transport c. Produces a H+ concentration gradient that ensures the diffusion of H+ back into the matrix 19. The brain is glucose dependent but can adapt to using ketones during a prolonged fast. a. True b. False 20. During gluconeogenesis, the liver: a. Converts the carbon from specific amino acids to glucose b. Converts the amino group from specific amino acids to glucose c. Metabolizes fatty acids into ketones
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During high intensity exercises, which substrate is metabolized anaerobically? Answer: $\boxed{\text{Glucose}}$ Show more…
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When the blood glucose concentration is high, the level of cAMP in the liver decreases and glycolytic flux increases. Which biochemical steps occur under this condition? Protein kinase A is activated. Protein kinase A is not activated. Phosphofructokinase-2 is activated via phosphorylation by protein kinase A. Phosphofructokinase-2 is activated due to the lack of phosphorylation by protein kinase A. Fructose-2,6-bisphosphatase is activated via phosphorylation by protein kinase A. Fructose-2,6-bisphosphatase is activated due to the lack of phosphorylation by protein kinase A. Phosphofructokinase-1 is activated by fructose-2,6-bisphosphate. Phosphofructokinase-1 is inhibited by fructose-2,6-bisphosphate. Fructose-1,6-bisphosphatase is activated by fructose-2,6-bisphosphate. Fructose-1,6-bisphosphatase is inhibited by fructose-2,6-bisphosphate. II and V I, III, VII, and X II, IV, VIII, and IX II, IV, VII, and X After glucagon stimulates glucose production via glycogenolysis and/or gluconeogenesis in a liver cell, which steps are required to transport glucose to other cells in the body? Glucose is transported to other cells by the carrier protein GLUT-1. Glucose exits the liver cell via GLUT-1 and enters the bloodstream. Glucose cannot leave the liver cell. Glucose-6-phosphate is converted to glucose by GLUT-1. In certain smooth muscles, glucagon increases the amount of glucose available for glycolysis; under this condition, which enzyme is required to convert glucose-1-phosphate into a glycolytic intermediate? No enzyme is needed for this conversion. G6Pase glucokinase (or hexokinase) phosphoglucomutase
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