Unit 1.8 - Energy Systems Flashcards

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1
Q

Describe the respiratory events that occur in anaerobic conditions?

A
  • During vigourous exercise the muscle cells do not get sufficient oxygen to support the electron transport chain
  • Under these conditions the cells respire anaerobically pyruvate is converted to lactate.
  • This conversion involves the transfer of hydrogen irons from the NADH produced during glycolysis to pyruvate to produce lactate
  • This regenerates there in a NAD needed to maintain ATP production through glycolysis
  • Lactates accumulates in muscle causing fatigue
  • The oxygen debt is repaid when exercise is complete allowing respiration to provide the energy to convert lactate acid back to pyruvate and glucose in the liver
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2
Q

What are the types of activities for fast and slow twitch fibres?

A

Fast twitch - Strength and speed

Slow twitch - Stamina and endurance

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3
Q

What is the blood supply like in fast and slow twitch fibres?

A

Fast twitch - free blood vessels

Slow twitch - many blood vessels

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4
Q

How is energy released in fast and slow twitch fibres?

A

Slow twitch - large amounts slowly

Fast twitch - small amounts quickly

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5
Q

What is the number of mitochondria like in fast and slow twitch fibres?

A

Fast twitch - fewer

Slow twitch - more

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6
Q

What is the number of myoglobin like for fast twitch compared to slow twitch?

A

Fast twitch - less

Slow twitch - more

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7
Q

What type of respiration is in fast and slow twitch fibres?

A

Fast twitch - anaerobic respiration

Slow twitch - aerobic respiration

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8
Q

Where is the fuel stored in fast and slow twitch fibres?

A

Slow twitch - fats

Fast twitch - Glycogen

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