Human Physiology
15th Edition
ISBN: 9781259864629
Author: Fox, Stuart Ira
Publisher: Mcgraw-hill Education,
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Textbook Question
Chapter 5, Problem 21RA
Why is the production of lactic acid termed a "fermentation" pathway?
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Which of the following is true of the steps of glycolysis which yield pyruvate as the end product?
a) They all occur in the cytoplasm.
b) They all occur in the mitochondria.
c) They occur primarily in the mitochondria.
d) They occur primarily in the cytoplasm.
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 process
a) What is the reason for the non-oxidative phase of the pentose phosphate pathway?b) Which compound is converted into which compound in the step where sequential dehydration and hydration reactions occur in the citric acid cycle?c) Why is ammonia released in some tissues carried by binding to other molecules in the blood? Where is it transmitted in the body for its destruction? What molecule is it transferred onto there? So what molecule does it make?
Chapter 5 Solutions
Human Physiology
Ch. 5 - Define the term glycolysis in terms of its initial...Ch. 5 - What are the initial substrates and final products...Ch. 5 - Describe the physiological functions of lactic...Ch. 5 - Compare the fate of pyruvate in aerobic and...Ch. 5 - Draw a simplified citric acid cycle and indicate...Ch. 5 - Explain how NADH and FADH2 contribute to oxidative...Ch. 5 - Explain how ATP is produced in oxidative...Ch. 5 - Describe glycogenesis and glycogenolysis, and...Ch. 5 - Explain the significance of gluconeogenesis and...Ch. 5 - Prob. 6aCP
Ch. 5 - Prob. 6bCPCh. 5 - Describe transamination and deamination and...Ch. 5 - List five blood-borne energy carriers and explain,...Ch. 5 - Prob. 1RACh. 5 - In anaerobic metabolism, the oxidizing agent for...Ch. 5 - When skeletal muscles lack sufficient oxygen,...Ch. 5 - The conversion of lactic acid to pyruvic acid...Ch. 5 - Which of these statements about the oxygen in the...Ch. 5 - In terms of the number of ATP molecules directly...Ch. 5 - Ketone bodies are derived from
Ch. 5 - Prob. 8RACh. 5 - The conversion of glucose 6-phosphate to free...Ch. 5 - The formation of glucose from pyruvic acid derived...Ch. 5 - Which of these organs has an almost absolute...Ch. 5 - When amino acids are used as an energy source,
Ch. 5 - Intermediates formed during fatty acid metabolism...Ch. 5 - State the advantages and disadvantages of the...Ch. 5 - What purpose is served by the formation of lactic...Ch. 5 - Describe the effect of cyanide on oxidative...Ch. 5 - Describe the metabolic pathway by which glucose...Ch. 5 - Prob. 18RACh. 5 - Explain how energy is obtained from the metabolism...Ch. 5 - Prob. 20RACh. 5 - Why is the production of lactic acid termed a...Ch. 5 - Prob. 22RACh. 5 - What three molecules serve as the major substrates...Ch. 5 - A friend, wanting to lose weight, eliminates all...Ch. 5 - Suppose a drug is developed that promotes the...Ch. 5 - For many years, the total number of molecules of...Ch. 5 - People who are starving have very thin arms and...Ch. 5 - Prob. 28RACh. 5 - Prob. 29RACh. 5 - Prob. 30RACh. 5 - Prob. 31RACh. 5 - Prob. 32RACh. 5 - Prob. 33RA
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- What is the major purpose of the pentose phosphate pathway? What cofactor (coenzyme) is used?arrow_forwardc) As what molecule does each of the monosaccharides enter glycolysis? d) How many moles of ATP are generated from the complete oxidation of one mole of lactose? Show all the steps for the calculation of moles of ATP. Be sure to account for energy used in activating the components of lactose so that they can enter glycolysis.arrow_forwardd) What enzymes of glycolysis are bypassed in gluconeogenesis? e) What enzymes are unique to gluconeogenesis? f) What enzymes are the sites of regulation in gluconeogenesis? g) Describe how glycolysis & gluconeogenesis are reciprocally regulated.arrow_forward
- What are the end-products of anaerobic catabolism of glucose via fermentation?arrow_forwardWhich of the following is not associated with Lactic Acid fermentation? cause of muscle cramps glycolysis bread anaerobicarrow_forwardWhich statement best describes the reason why some of the reactions of glycolysis cannot be run in reverse in gluconeogenesis? 1) The last reactions occur in mitochondria and reactions there can never be reversed. 2) Glycolysis includes isomerization reactions and these can never be reversed. 3) There are some allaşteric enzymes and allosteric enzymes can never be reversed. 4) Some reactions have such large negative free energy changes that they can never be reversed under cellular conditions. Oarrow_forward
- Which of the following statements regarding the glycolysis pathway is FALSE? A) O Two pyruvate molecules are generated. B) O ATP molecules are generated via substrate-level phosphorylation C) O It does not require oxygen to operate D) O ATPS are used (hydrolyzed) in the beginning of glycolysis. E) O None of the above are false; they are all true statementsarrow_forwardDEFINE THE FOLLOWING TERMS: a) Gluconeogenesis b) Glycolysis c) Citric Acid Cycle Please explain this in-detailed and longer, thank you.arrow_forwardWhich of the following enzyme catalyzes the conversion of pyruvate to lactate? * Oa) Pyruvate reductase Ob) Lactate reductase O c) Lactate dehydrogenase Od) Pyruvate dehydrogenasearrow_forward
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