Energy systems
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Energy Systems PowerPoint PPT Presentation


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Energy Systems. Goal:. I will be able to explain how my body converts food into a usable form of energy for my cells. . Generating Energy. How does the human body generate energy? Carbohydrates Proteins Fats. Carbohydrates. Among the most common organic compounds on earth.

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Energy Systems

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Energy systems

Energy Systems


Energy systems

Goal:

  • I will be able to explain how my body converts food into a usable form of energy for my cells.


Generating energy

Generating Energy

  • How does the human body generate energy?

  • Carbohydrates

  • Proteins

  • Fats


Carbohydrates

Carbohydrates

  • Among the most common organic compounds on earth.

  • Digestion breaks down carbohydrates into glucose.

  • Glucose is stored in the liver and skeletal muscles in the form of glycogen.

Glucose


Adenosine triphosphate atp

Adenosine triphosphate (ATP)

  • Metabolic pathways convert the chemical potential energy in foods we eat into ATP.

  • ATP fuelscellular processes in our bodies.

  • ADP + P + Energy → ATP

  • ATP video


Metabolic pathways pathway 1 atp pc system

Metabolic Pathways Pathway 1: ATP-PC System

  • Anaerobic process that occurs in the cytoplasm of cells.

  • First of the two anaerobic energy pathways.

  • Makes enough ATP to sustain intense activity for about 15 seconds.

  • System involves breaking a phosphate group off of phosphocreatine (PC) molecule and adding it to ADP creating ATP.

  • PC + ADP → ATP + creatine

    (Speed Skating Video – Men Team Pursuit)


Pathway 2 glycolysis

Pathway 2: Glycolysis

  • Allows athletes to participate in a high level of performance for an additional 1-3 minutes.

  • Anaerobic process that occurs in the cytoplasm.

  • Products of this reaction include ATP and a molecule called pyruvate.

  • Pyruvatethen moves on to the next pathway which is aerobic.


Energy systems

  • Pathway Overview Video


Lactic acid

Lactic Acid

  • In the absence of sufficient oxygen, pyruvate is converted into lactic acid.

  • Lactic acid builds up in the muscle fibres and causes pain and reduces movement.


Energy systems

Work:

Read Chapter 5 (pgs 81 – 84)

1. List the three key energy nutrients.

2. What is the role of carbohydrates as an energy source?

3. Why is ATP essential for life?

4. Compare anaerobic and aerobic systems.

5. List the type of activities that would use the ATP-PC system and Glycolysis.

CHECK H/W


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