Human Physiology
15th Edition
ISBN: 9781259864629
Author: Fox, Stuart Ira
Publisher: Mcgraw-hill Education,
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Chapter 5, Problem 3RA
When skeletal muscles lack sufficient oxygen, there is an increased blood concentration of
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Students have asked these similar questions
The energy for muscle contraction is most directly obtained from a.phosphocreatine. b.ATP. c.anaerobic respiration. d.aerobic respiration.
Under what conditions will lactic acid accumulate in skeletal muscle?
Select one:
A.
When NADH is depleted.
B.
When O2 is depleted.
C.
When ATP is depleted.
D.
When citric acid enzymes are depleted.
Under what conditions will lactic acid accumulate in skeletal muscle?
A. when citric acid enzymes are depleted
B. when ATP is depleted
C. when O2 is depleted
D. when NADH is depleted
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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- Which of the following is true? A) Tendons join bone to bone B E Tendons join muscle to bone and other structures Ligaments join bone to bone Ligaments join muscle to bone and other structures a. and b. b. and C. Questions Filter (12) Molvier OLarrow_forwardAn athlete participates in aerobic exercise three times a week. One of the changes is an increased ability to deliver oxygen to her skeletal muscles. Over time she notices that she can continue the exercise with greater intensity and duration. The reason for this change is that there is a(n) a. greater response from phosphate transfer. b. greater production of ATP from glycolysis and less from aerobic cellular respiration. c. greater production of ATP from aerobic cellular respiration. d. increased production of lactate.arrow_forwardWhich of the following is a valid statement about lactate? a. Is responsible for the burning sensation in the muscles during exercise b. Primarily produced as a result of insufficient oxygen availability in the cell c. Causes DOMS after rigorous exercise d. “Metabolic waste product” produced during exercise e. Ice massage should be employed after exercise to flush lactate out of the skeletal muscle after exercise f. None of the above are true g. Both A and B are truearrow_forward
- Which of the following is an effect of training on the oxidative system? A. It increases vascularization within the muscles. B. It increases the number and size of mitochondria within the muscle-fibers. C. It increases the activity of the enzymes involved D. all of the abovearrow_forwardWhich of the following statements about skeletal muscle is CORRECT? Select one: a. An increase in Na+ concentration in the cytosol starts muscle filament sliding. b. The muscle is non-striated and involuntary. c. The muscle is involved in shivering thermogenesis. d. The muscle contracts in response to parasympathetic stimulation. e. The muscle contracts in response to hormones.arrow_forwardwhat does paying back the oxygen debt after muscle activity involve ? b. storing gylcogen in the blood as glucose molecus are stoned in this tissue c. reconcertig latic acid to pyruvic acid & replenishing ATP and gylogen stores . d. breaking down lipid molecusles to replenish the amount of avaible atparrow_forward
- The “glycolytic” white fibers in Human Skeletal Muscle: a. lack myosin b. are used for rapid contraction “burst” exercise c. oxidize glucose to pyruvate and then release lactic acid into the bloodstream d. produce ketone bodies e. produce ethanolarrow_forwardA fatigued muscle lacks sufficient oxygen for the aerobic respiration to supply needed ATP. The accumulation of Select one: a. acetic acid occurs and contractions occur with less strength b. lactic acid (lactate) occurs and muscle cramps may set in c. pyruvate occurs and muscle cramps set in d. ethyl alcohol occurs and less frequent contractions occurarrow_forwardMuscle fatigue is caused by a buildup of a. glycogen. b. oxygen. c. lactic acid. d. ATP.arrow_forward
- Myoglobin .... a.is a protein involved in the direct phosphorylation of ADP b.breaks down glycogen c.produces the end plate potential d.stores oxygen in muscle cellsarrow_forwardWhich molecule below is readily converted to ATP in muscle? A. glycogen B. phospho-creatine C. cAMP D. fatty-acyl carnitine E. glutaminearrow_forwardWhich of the following is false regarding smooth muscle? A. It contracts slower than skeletal muscle. B. It is multinucleated. C. It maintains contraction longer while using less energy than skeletal muscle. D. It is smaller than skeletal muscle. E. All the above are true. Select one: O A B OD O Earrow_forward
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