Which pathways are stimulated by glucagon? Select all that apply. glycogen synthesis glycogen metabolism glycolysis ketogenesis cholesterol synthesis fatty acid synthesis
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- Different control mechanisms are used to regulate the synthesis of glycogen. Match the action on the left with the effect on the right. Increase in the concentration of inorganic phosphate ion Decrease in the activity of phosphoprotein phosphatase Phosphorylation of glycogen phosphorylase Dephosphorylation of glycogen synthase Ű Clear All Decreasing glycogen synthesis Increasing glycogen synthesis No effect on glycogen synthesisin triacylglycerol mobilization, triacylglycerol molecules is activated by: phosphorylation hydrolysis reduction oxidationDuring anaerobic conditions, lactate travels from the muscle to the liver via the bloodstream. What is lactate converted into when it reaches the liver before it returns back to the muscle? Glucagon Citrate Acetyl CoA Glycogen Glucose
- Identify the enzymes that are required for the synthesis of a glycogen particle starting from glucose 6-phosphate. glycogen synthase kinase UDP-glucose pyrophosphorylase glycogen phosphorylase branching enzyme glycogen synthaseWhat glycolytic intermediate is fructose converted to in the muscle, such that it can be utilized in glycolysis? Glucose 6-phosphate Fructose 6-phosphate Glyceraldehyde 3-phosphate Dihydroxyacetone phosphateWhy does the lack of glucose 6-phosphatase activity in the brain and muscle make good physiological sense? Glucose 6-phosphatase allows cells to trap glucose in the cell; however, these tissues primarily rely on noncarbohydrate energy sources. Glucose 6-phosphatase allows cells to generate glucose through gluconeogenesis; however, gluconeogenesis only takes place in the liver. Glucose 6-phosphatase allows cells to release glucose into the blood; however, these tissues should never release glucose. Glucose 6-phosphatase provides glucose 6-phosphate for glycogen synthesis; however, these tissues do not need glycogen.
- Which of the following statements about gluconeogenesis is correct? * Muscles have a large glycogen store which gives rise to blood glucose during prolonged starvation Fatty acids are plentiful in the blood during starvation and are used for glucose synthesis The enzyme glucose-6-phosphatase hydrolyses glucose-6-phosphate and is present in most cells. Gluconeogenesis enables the liver O to maintain blood glucose levels during starvationGlycogen that is broken down in the muscle is not released as glucose into the circulation because the muscle lacks... Group of answer choices glucose-6-phosphatase phosphoryalse glycogen synthase hexokinaseGlycogen synthase catalyzes glycogen synthesis. Determine whether each intermediate is associated with an “increase” or “decrease” and or “no effect” on the activity of glycogen synthase. Glucose 6-phosphate – cAMP –
- Upon exposure to glucagon, what is the phosphorylation state and activity of Triacylglycerol Lipase? O Phosphorylated, active O Unphosphorylated, active O Phosphorylated, inactive O Unphosphorylated, inactiveTRUE or FALSE b-hydroxybutyrate is not a ketone body a ketotic state acetoacetate is produced from high levels of insulin Tissues that lack mitochondria cannot utilize ketone bodies The brain never oxidizes fatty acids Synthesis of Triglycerides requires a condensation type of reaction Enzyme increase the activation energy of a reaction that leads to a faster reaction rate Working muscle burns fatty acids True [Choose ] [Choose ] [Choose ] [Choose ] [Choose ] [Choose ]Which enzyme activity of the glycogen debranching enzyme is operating during the release of glucose units linked to glycogen branchpoints via a1,6 glycosidic linkage? phosphatase activity phosphorylase activity glucosidase activity transferase activity