Unit 1(1.8)- Energy Systems In Muscle Cells Flashcards
Where does the energy required for repetitive muscular contraction come from?
A compound called creative phosphate.
What does the creative phosphate break down to?
Provide energy and a phosphate.
After how many seconds of strenuous muscle activity will creatine phosphate run out?
About 10 seconds.
During vigorous exercise, what is pyruvate converted into?
Lactic acid.
What does the conversion of pyruvate to lactic acid involve?
The transfer of hydrogen from NADH that are produced during glycolysis.
Over time what happens to the lactic acid?
It accumulates the muscle cells causing fatigue.
How is the oxygen debt repayed?
When exercise stops.
What are the two types of skeletal muscle fibres?
Slow twitch and fast twitch
Do slow twitch contract more slowly or more quickly, are they good for endurance activities or sprinting?
More slowly and endurance activities.
What is the major storage fuel of slow twitch muscle fibres?
Fats.
Do fast twitch have more mitochondria or fewer, and do they have a large blood supply or a lower blood supply?
Few mitochondria and a lower blood supply.
What are the major storage rules of fast twitch muscle fibres?
Glycogen and creative phosphate.
