Exercise Physiology Quiz

1. 1What is the function of the phosphocreatine system

   1. AComplete oxidation of carbohydrates, fats, proteins
   2. BProvides energy for muscular contraction at the onset of short-term, high-intensity exercise
   3. CBreakdown of glucose or glycogen into 2 molecules of pyruvate or lactate
   4. DUse NADH/FADH2 to re-phosphorylate ADP to ATP
2. 2The most important high energy phosphate compound in the muscle cell is

   1. AATP
   2. BFAD
   3. CNAD
   4. DGTP
3. 3What is the enzyme responsible for catalyzing the immediate energy system ?

   1. AAdenylate cyclase
   2. BMyosin ATPase
   3. CCreatine kinase
   4. DLactate dehydrogenase
4. 4A high level of __________in the muscle fiber would slow glycolysis by inhibiting its rate limiting enzyme.

   1. AADP
   2. BATP
   3. CPi
   4. DG3P
5. 5The rate limiting enzyme in glycolysis is [blank_start]Phosphofructokinase[blank_end]

   1. APhosphofructokinase
6. 6Aerobic Production of ATP occurs in the _______.

   1. AMitochondria in a process called glycolysis
   2. BMitochondria in a process called oxidative phosphorylation
   3. CMitochondria in a process called beta oxidation
   4. DCytoplasm
7. 7The primary function of the Krebs cycle is to _____.

   1. AProduce ATP via substrate-level phosphorylation
   2. BPrime glycolysis for the production of ATP
   3. CComplete the oxidation of carbohydrates, fats & proteins (ex. Form NADH & FADH)
   4. DProduce H2O and ATP
8. 8The rate limiting enzyme in the ETC is _____.

   1. APhosphofructokinase
   2. BIsocitrate dehydrogenase
   3. CMyosin ATPase
   4. DCytochrome oxidase
9. 9What is the rate-limiting enzyme for the Krebs cycle?

   1. Aisocitrate dehydrogenase
   2. Bcreatine kinase
   3. Ccytochrome oxidase
   4. Dphosphofructokinase
10. 10What is Glycolysis stimulated by?

    1. AAMP, ADP, Pi, increase in pH
    2. BADP, NADH, pyruvate
    3. CDecrease in pH, ADP, AMP, Pi
    4. DATP, citrate, decrease in pH, CP

11. 11What is the Krebs cycle inhibited by?

    1. AATP, NADH
    2. BNADH, FADH
    3. CADP, FADH
    4. DCa 2+, NADH
12. 12What is Glycolysis inhibited by?

    1. AATP, CP, citrate, pH decrease
    2. BATP, NADH
    3. CATP
    4. DADP, Pi
13. 13What is the ETC stimulated by?

    1. AADP, Pi
    2. BNADH, FADH
    3. CNADH, FADH, H+
    4. DH+
14. 14What stimulates the Krebs Cycle?

    1. AADP, Ca, NAD
    2. BATP, NADH
    3. CPyruvate, CO2
    4. DCitrate, Acetyl-CoA
15. 15The process of beta-oxidation involves:

    1. ABreaking down stored triglycerides to form FFA
    2. BThe addition of oxygen to fatty acid
    3. CBreakdown of FFA to form acetyl-CoA
    4. DNone of these
16. 16The primary function of Krebs Cycle is?

    1. AThe complete oxidation of food stuffs using NAD and FAD as hydrogen (electron) carriers
    2. BCatalyze the phosphorylation of ADP from creatine phosphate
    3. COxidize food stuff and transfer those electrons to pyruvic acid
    4. DConvert lactate to pyruvate
17. 17Glycolysis can produce two adenosine triphosphate (ATP) directly via substrate level phosphorylation and an additional five ATP by the energy contained in 2 molecules of __________.

    1. ANADH
    2. BFADH
    3. CGlycogen
    4. DPyruvate
18. 18What does a kinase catalyze?

    1. AThey add a phosphate group to a substrate
    2. BThey remove hydrogen atoms from a substrate
    3. CThey catalyze oxidation-reduction reactions involving molecular oxygen
    4. DThey rearrange atoms within their substrate to form structural isomers
19. 19What is the role of dehydrogenase enzymes

    1. AThey add a phosphate group to a substrate
    2. BThey rearrange atoms within their substrate to form structural isomers
    3. CThey remove hydrogen atoms from their substrate
    4. DThey catalyze oxidation-reduction reactions involving molecular oxygen
20. 20What role does an oxidizing enzyme play?

    1. AThey remove hydrogen atoms from a substrate
    2. BThey add a phosphate group to a substrate
    3. CThey catalyze oxidation-reduction reactions involving molecular oxygen
    4. DThey rearrange atoms within their substrate to form structural isomers
21. 21What do isomerases catalyze?

    1. AThey rearrange atoms within their substrate to form structural isomers
    2. BThey remove hydrogen atoms from a substrate
    3. CThey add a phosphate group to a substrate
    4. DThey catalyze oxidation-reduction reactions involving molecular oxygen
22. 22During chemical reactions, enzymes work as catalysts by______.

    1. AIncreasing the activation energy
    2. BAltering the chemical composition of the reactants
    3. CChanging the nature of the reaction
    4. DDecreasing the activation energy
23. 23Identify the terms that describe the pathway responsible for the process of oxidative phosphorylation? (check all that apply)

    1. AThe glucose chain
    2. BThe nuclear chain
    3. CThe cytochrome chain
    4. DThe respiratory chain
24. 24The effectiveness of the ATP-PC system and glycolysis in the first minutes of exercise of a 3-minute exercise bout is such that ATP levels in the muscle virtually _________.

    1. ATripled
    2. BDepleted
    3. CDoubled
    4. DUnchangeable
25. 25The _____ does not fall instantaneously from the steady-state value measured during the exercise to the resting value that can be associated with standing by a treadmill

    1. ABody mass index
    2. BBlood pressure
    3. CPlasma glucagon level
    4. DMetabolic Rate
26. 26[blank_start]Liver[blank_end] glycogen stores mainly serve as a means of replacing blood glucose levels

    1. ALiver
27. 27Low-Intensity exercise relies primarily on ____ as a fuel for energy production.

    1. AFats
    2. BCarbohydrates
    3. CProtein
    4. DNucleic Acids
28. 28Which of the following hormones stimulate lipase activity (check all that apply)

    1. AOxytocin
    2. BNorepinephrine
    3. CInsulin
    4. DEpinephrine
    5. EGlucagon
29. 29What is a function of glucagon?

    1. AIt prevents the mobilization of FFA from adipose tissue
    2. BIt stimulates glycogenolysis
    3. CIt activates the complement system
    4. DIt inhibits gluconeogensis
30. 30In the context that hormones account for the vast majority of glucose mobilized from the liver, elevated ________ stimulates the hydrolysis of glycogen, fat and protein, and increase gluconeogenesis in the body during fasting or exercise

    1. AInsulin
    2. BCalcitonin
    3. CEndothelin
    4. DGlucagon
31. 31During strenuous exercise, there is an obligatory demand for _______ oxidation that must be met in order to generate energy.

    1. AFatty Acid
    2. BCholesterol
    3. CProtein
    4. DCarbohydrate
32. 32Identify the true statements about the combined role of glucagon and insulin during moderate to vigorous exercise (Check all that apply)

    1. AThey are viewed as primary catecholamines in the mobilization of glucose from the liver and FFA from adipose tissue
    2. BThe ratio of glucagon to insulin provides control over the mobilization of liver glucose and adipose tissue FFA
    3. CThe ratio of glucagon to insulin drives the availability of fuel in the plasma by decreasing gluconeogenesis in the liver
    4. DThey account for the vast majority of the glucose mobilized from the liver during moderate to vigorous exercise
33. 33What is the function of somatostatin

    1. AIt modifies the activity of the GI tract to control the rate of entry of nutrients into circulation
    2. BIt slows down gastric emptying
    3. CIt regulates the circadian rhythm
    4. DIt increases blood calcium levels by indirectly stimulating the osteoclasts
34. 34Identify the enzyme that inactivates and converts cyclic AMP to 5' AMP

    1. APhosphodiesterase
    2. BPhosphorylase
    3. CDehydrogenase
    4. DThreonine kinase
35. 35The growth hormone plays a major role in the synthesis of tissue _____.

    1. ACarbohydrate
    2. BFat
    3. CProtein
    4. DNucleic Acid
36. 36Which of the following help maintain the plasma glucose concentration in the human body ? (check all that apply)

    1. AMobilizing existing glucose from liver glycogen stores to maintain the plasma glucose level
    2. BBlocking glucose entry into cells to force the cell to use fat as fuel, and thus sparing plasma glucose
    3. CInhibiting plasma FFA transport from adipose tissue to increase the use of fat and plasma glucose as fuels
    4. DPreventing the synthesis of new glucose in the liver to have glycerol available as needed
37. 37Identify the hormone that is transported bound to a plasma protein

    1. AGastrin
    2. BErythropoietin
    3. CCalcitonin
    4. DThyroxine
38. 38After the release of the thyroid hormones, most of T4 is converted to _____.

    1. ATSH
    2. BT3
    3. CParathormone
    4. DCalcitonin
39. 39In the context of the processes through which the plasma glucose concentration is maintained in the body, identify the substrates for gluconeogenesis in the liver.

    1. ACalcium and calmodulin
    2. BAmino acids and lactate
    3. CMevalonic acid and lanosterol
    4. DUDP-glucose and hexokinase
40. 40In the context of the hormone that account the vast majority of the glucose mobilized from the liver, when meal is being absorbed, elevated ________ drives the uptake and storage of glucose, amino acids, and fatty acids to lower levels in the plasma.

    1. AGlucagon
    2. BInsulin
    3. CVasopressin
    4. DRelaxin
41. 41Formation of products [blank_start]decreases[blank_end] potential energy but results in an [blank_start]increase[blank_end] in kinetic energy

    1. Adecreases
    2. Bincrease
42. 42Transfer of potential energy in any spontaneous process always proceeds in a direction that [blank_start]decreases[blank_end] the capacity to perform work

    1. Adecreases
43. 43What store the main nutrients in exercise metabolism?

    1. ASkeletal Muscle
    2. BAdipose Tissue
    3. CLiver
    4. DAll of the above
44. 44What inhibits phosphofructokinase (PFK)?

    1. ACitrate
    2. BATP
    3. CADP
    4. DLactate
45. 45[blank_start]Acetyl-CoA[blank_end] is the major substrate of oxidative phosphorylation

    1. AAcetyl-CoA
46. 46What enzyme converts blood glucose into glucose-6-phosphate during glycolysis ?

    1. AHexokinase
    2. BPhosphofructokinase
    3. CGlycogen phosphorylase
    4. DPhosphoglycerate kinase
47. 47What enzyme converts fructose 6-biphosphate into fructose 1, 6-biphosphate?

    1. APhospofructokinase
    2. BPyruvate kinase
    3. CHexokinase
    4. DPhosphoglycerate kinase
48. 48What enzyme is responsible for producing G3P into 1, 3-biphosphoglycerals (BPG)?

    1. AGlyercaldehyde 3-phosphate dehydrogenase (G3PD)
    2. BGlycogen phosphorylase
    3. CPyruvate kinase
    4. DGluconeogenesis
49. 49What enzyme is responsible for producing 3 phosphoglycerate during glycolysis?

    1. APhosphoglycerate kinase (PGK)
    2. BGlyceraldehyde 3-phosphate dehydrogenase (G3PD)
    3. CGlycogen phosphorylase
    4. DPyruvate kinase
50. 50During glycolysis, what enzyme is responsible for turning phosphoenolpyruvate (PEP) into pyruvate?

    1. APhosphoglycerate kinase
    2. BPyruvate kinase
    3. CGlyceraldehyde 3-phosphate
    4. DHexokinase
51. 51During the Krebs Cycle, what enzymes are involved in forming NADH+, H+? (Check all that apply)

    1. AIsocitrate dehydrogenase (IDH)
    2. BAlpha-ketoglutarate dehydrogenase
    3. CMalate dehydrogenase
    4. DSuccinyl-CoA
52. 52During the Krebs Cycle, what enzyme is involved in forming FADH2?

    1. ASuccinate dehydrogenase
    2. BSuccinyl-CoA synthase
    3. CCitrate synthase
    4. DMalate dehydrogenase
53. 53In the Krebs cycle, what enzyme is involved in direct ATP production?

    1. ASuccinate dehydrogenase
    2. BSuccinyl-CoA synthase
    3. CCitrate synthase
    4. DIsocitrate dehydrogenase
54. 54During the Krebs cycle, what enzyme forms citrate from oxaloacetate and acetyl-coA?

    1. ACitrate synthase
    2. BAlpha-ketoglutarate dehydrogenase
    3. CSuccinate dehydrogenase
    4. DIsocitrate dehydrogenase
55. 55 1 spin of the Krebs cycle produces: [blank_start]3[blank_end] NADH, [blank_start]1[blank_end] FADH and [blank_start]1[blank_end] ATP and it loses [blank_start]2[blank_end] CO2

    1. A3
    2. B1
    3. C1
    4. D2
56. 56What are the rate-limiting enzymes of the Krebs Cycle or TCA cycle?

    1. AIsocitrate dehydrogenase (IDH)
    2. BGlycogen phosphorylase
    3. CCitrate
    4. DATP
57. 57What is the rate-limiting enzyme involved with the ETC?

    1. ACytochrome oxidase
    2. BATP synthase
    3. CNADH
    4. DCalcium
58. 58During the TCA cycle, what enzyme is involved in the production of FADH2?

    1. ASuccinate dehydrogenase
    2. BFumarase
    3. CAlpha-ketoglutarate dehydrogenase
    4. DMalate dehydrogenase
59. 59Rate limiting enzyme for lipid catabolism is [blank_start]beta-hydroxyacyl CoA[blank_end] [blank_start]dehydrogenase[blank_end]

    1. Abeta-hydroxyacyl CoA
    2. Bdehydrogenase
60. 60Each cycle of beta-oxidation produces: [blank_start]1[blank_end] NADH, 1 [blank_start]FADH2[blank_end], 1 Acetyl-CoA and [blank_start]12[blank_end] ATP

    1. A1
    2. BFADH2
    3. C12
61. 61G3P: 2 ATP + 2 NADH + Acetyl-CoA
    
    So 1 glycerol = [blank_start]5[blank_end] NADH + 1 [blank_start]FADH[blank_end] + [blank_start]3[blank_end] ATP
    = [blank_start]12.5[blank_end] ATP + [blank_start]1.5[blank_end] ATP + [blank_start]3[blank_end] ATP
    = [blank_start]16[blank_end] ATP
    

    1. A5
    2. BFADH
    3. C3
    4. D12.5
    5. E1.5
    6. F16
    7. G3

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Sport Science Quiz on Exercise Physiology Quiz, created by Megan C on 10/10/2018.

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