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CISSN CHAPTER 1 (ENERGY SYSTEMS AND SKELETAL MUSCLE PLASTICITY QUESTIONS AND ANSWERS 2024/2025 £8.57
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CISSN CHAPTER 1 (ENERGY SYSTEMS AND SKELETAL MUSCLE PLASTICITY QUESTIONS AND ANSWERS 2024/2025
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The ability of skeletal muscle to perform work to sustain muscle contraction, are contingent on the availability of ______________________. → adenosine triphosphate (ATP) The issue of ATP availability is a function of the muscle fiber's ability to synthesize ATP from _______________________...

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  • October 15, 2024
  • 15
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • cissn chapter 1 energy systems and skeletal musc
  • the ability of skeletal muscle to perform work to

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2 0 2 4 /2025 | © copyright | This work may not be copied for profit gain Excel!


CISSN CHAPTER 1 (ENERGY SYSTEMS
AND SKELETAL MUSCLE PLASTICITY
QUESTIONS AND ANSWERS 2024/2025
The ability of skeletal muscle to perform work to sustain muscle contraction, are contingent on

the availability of ______________________.

→ adenosine triphosphate (ATP)


The issue of ATP availability is a function of the muscle fiber's ability to synthesize ATP from

_______________________ and to also resynthesize itself once it has been degraded to

yield energy.


→ macronutrients (carbs, fats, proteins)


Within the muscle fiber, there are three "systems" in which ATP is provided for cell work, often

termed the __________________.

→ three metabolic energy systems


What are the three metabolic energy systems?

→ 1. Immediate Energy System
→ 2. Lactic Acid System
→ 3. Oxidative System


The immediate energy system in skeletal muscle is comprised of ______________ separate

chemical reactions which all working in an integrated manner during high-intensity, explosive

exercise, to degrade ATP, such that energy can be liberated and used for myocellular work.

→ three (3)



1|Page| GradeA+ | 2 0 0 2 5

, 2 0 2 4 /2025 | © copyright | This work may not be copied for profit gain Excel!

The immediate energy system is considered to be ________________ and _______________

meaning that it does not rely on oxygen to drive this process, as ATP and creatine phosphate

(CP) hydrolysis does not depend on oxygen availability nor does it yield lactic acid (as with

glycolysis).


→ -anaerboic
→ and
→ -alactic


The immediate energy system involves the stored intracellular levels of ATP, which are coupled

to creatine phosphate (CP) stored within the muscle fiber. This constitutes the

________________ System.


→ ATP-CP System (phosphagen system)


This reaction in the immediate energy system involves the hydrolysis of ATP to form ADP and

inorganic phosphate (Pi), and is catalyzed by ATPase.

→ Reaction 1: ATP + H20 ____ATPase________ > ADP + Pi


This reaction in the immediate energy system utilizes the ADP from reaction 1 and is used to

combine with creatine phosphate (CP) to form ATP and creatine (C), catalyzed by the enzyme

creatine kinase (CK).

→ Reaction 2a: ADP + CP _____ creatine kinase______ > ATP + C


This reaction in the immediate energy system utilizes the ADP from reaction 1 and combines it

with another ADP to form ATP and AMP, catalyzed by the enzyme adenylate

kinase/myokinase.

→ Reaction 2b: ADP + ADP _____ myokinase______ > ATP + AMP


1|Page| GradeA+ | 2 0 0 2 5

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