ORTCITIAEE: Energy and Twitch speed Flashcards
what organelle does aerobic respiration occur in?
Mitochondria
What organelle does anaerobic respiration occur in?
Cytoplasm
When does aerobic respiration occur?
When ATP demand matches glucose and oxygen supply.
When does anaerobic respiration occur?
When ATP demand is greater than glucose and oxygen supply.
When is phosphocreatine used?
When ATP demand is greater than glucose and oxygen supply.
How does the use of phosphocreatine work?
Rapid phosphorylation of ADP to ATP
Our muscles are made up of _____ and _____ muscle fibres.
Fast and slow
what are fast twitching muscle fibres used for?
Fast, powerful contractions during quick bursts of exercise.
Where do fast twitching muscles source their ATP from?
- Anaerobic respiration
- Phosphocreatine
What is the structure of a fast twitching muscle like?
- Lots of phosphocreatine
- Few mitochondria
What are slow twitching muscle fibres used for?
Slow, weak contraction during long periods of activity.
Where do slow twitching muscles source their ATP from?
Aerobic respiration
What is the structure of a slow twitching muscle like?
- Few phosphocreatine
- Lots of mitochondria
Phosphocreatine is a chemical that ________ ADP to make ATP.
Phosphorylates
Why are fast twitching muscles able to produce ATP quickly?
They use anaerobic respiration
