Unit 1.8 - Energy Systems Flashcards
Describe the respiratory events that occur in anaerobic conditions?
- 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
What are the types of activities for fast and slow twitch fibres?
Fast twitch - Strength and speed
Slow twitch - Stamina and endurance
What is the blood supply like in fast and slow twitch fibres?
Fast twitch - free blood vessels
Slow twitch - many blood vessels
How is energy released in fast and slow twitch fibres?
Slow twitch - large amounts slowly
Fast twitch - small amounts quickly
What is the number of mitochondria like in fast and slow twitch fibres?
Fast twitch - fewer
Slow twitch - more
What is the number of myoglobin like for fast twitch compared to slow twitch?
Fast twitch - less
Slow twitch - more
What type of respiration is in fast and slow twitch fibres?
Fast twitch - anaerobic respiration
Slow twitch - aerobic respiration
Where is the fuel stored in fast and slow twitch fibres?
Slow twitch - fats
Fast twitch - Glycogen