Exercise Physiology: Theory and Application to Fitness and Performance
9th Edition
ISBN: 9780073523538
Author: Scott K Powers, Edward T Howley
Publisher: McGraw-Hill Education
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Chapter 3, Problem 10O
Summary Introduction
To identify: The enzymes that are considered as rate limiting in glycolysis and the Krebs cycle.
Introduction: Energy is necessary for all living organisms to carry out their life processes. Living cells obtain energy in different forms, and they also have mechanisms to convert energy from one form to different forms. Energy is defined as the capability to do work. When work is done, energy is transferred from one form to another form or between systems.
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Identify the enzymes that are considered rate limiting in glycolysis and the citric acid cycle.
Identify the enzyme that controls the oxidative phase of the pentose phosphate pathway.
List all of the regulatory enzymes from both Glycolysis and Gluconeogenesis, and under each, list the (-) inhibitors and the (+) activators.
Chapter 3 Solutions
Exercise Physiology: Theory and Application to Fitness and Performance
Ch. 3 - Prob. 1OCh. 3 - Prob. 2OCh. 3 - Prob. 3OCh. 3 - Prob. 4OCh. 3 - Prob. 5OCh. 3 - Prob. 6OCh. 3 - Prob. 7OCh. 3 - Prob. 8OCh. 3 - Prob. 9OCh. 3 - Prob. 10O
Ch. 3 - Prob. 1SACh. 3 - Prob. 2SACh. 3 - Prob. 3SACh. 3 - Prob. 4SACh. 3 - Prob. 5SACh. 3 - Prob. 6SACh. 3 - Prob. 7SACh. 3 - Prob. 8SACh. 3 - Briefly discuss the function of glycolysis in...Ch. 3 - Discuss the operation of the Krebs cycle and the...Ch. 3 - Prob. 11SACh. 3 - Prob. 12SACh. 3 - Prob. 13SACh. 3 - Briefly discuss the interaction of anaerobic...Ch. 3 - Prob. 15SACh. 3 - Prob. 16SACh. 3 - Prob. 17SA
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- Von Gierke’s disease is also known as glycogen storage disease type I. Patients with von Gierke’s disease lackglucose 6-phosphatase activity. Two prominent symptoms of this disorder are fasting hypoglycemia and lactic acidosis (elevated lactate levels in the blood), especially during strenuous exercise. Explain why these symptoms occur. What chemical reaction does this enzyme catalyze? Which pathways involve this enzyme? Lacking thisthe enzyme will cause impairment of which pathways?• Pls consider what pathways are affected by Von Gierke’s disease. Include in your explanation involving Cori’s cycle. can you please do not write by your hand? I mean computer if you can. thank youarrow_forwardGlycolysis and gluconeogenesis share most of their reactions and enzymes, apart from the three irreversible reactions in glycolysis. Provide a simplified schematic presentation (metabolic map) of glycolysis and gluconeogenesis; and indicate the enzymes that differ between the two processes.arrow_forwardVon Gierke’s disease is also known as glycogen storage disease type I. Patients with von Gierke’s disease lackglucose 6-phosphatase activity. Two prominent symptoms of this disorder are fasting hypoglycemia and lactic acidosis (elevated lactate levels in the blood), especially during strenuous exercise. Explain why these symptoms occur. What chemical reaction does this enzyme catalyze? Which pathways involve this enzyme? Lacking thisenzyme will cause impairment of which pathways?• Pls consider what pathways are affected by Von Gierke’s disease. Include in your explanation involving the Cori’s cycle.arrow_forward
- Thioesters play important roles in glycolysis and tca cycle. List which reactions involve thioesters.arrow_forwardDEFINE THE FOLLOWING TERMS: a) Gluconeogenesis b) Glycolysis c) Citric Acid Cycle Please explain this in-detailed and longer, thank you.arrow_forwardAlthough both hexokinase and phosphofructokinase catalyze irreversible steps in glycolysis and the hexokinase-catalyzed step is first, phosphofructokinase is nonetheless the pacemaker of glycolysis. What does this information tell you about the fate of the glucose 6-phosphate formed by hexokinase? Glucose 6-phosphate must be unstable and release its phosphoryl group over time. Glucose 6-phosphate must be utilized by other metabolic pathways. Glucose 6-phosphate must allosterically inhibit phosphofructokinase, but not hexokinase. Glucose 6-phosphate must be wasted when it is produced in excess.arrow_forward
- Of the 36 molecules of ATP produced by the complete metabolism of glucose, how many are produced directly in glycolysis alone, that is, before the common pathway?arrow_forwardIndicate whether the following statements are true or false:- a) The pentose phosphate pathway of glucose oxidation can lead to the release of energy. b) NAD + is a coenzyme of transketolase.arrow_forwardDefine GLUCONEOGENESIS. Give three reasons why is gluconeogenesis important in the Cori cycle?arrow_forward
- Identify the following as a characteristic of one or more following process: glycolysis, glycogenesis, Glycogenolysis, and gluconeogenesis. 1. Glucose 6-phosphate is the initial reactant 2. Glucose is the final product 3. Glucose 6-phosphate is produced in the first step 4. UTP is involved in the process 5. ADP is converted to ATP in this processarrow_forwardWhy isn’t the hexokinase step the commitment step for glycolysis even though it is the first step and is irreversible?arrow_forwardDescribe the cause and significance of metabolicsyndrome.arrow_forward
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