Muscle Structure And Function - Week 16 PBL Flashcards
1
Q
Three types of muscle in body?
A
Cardiac
Smooth
Skeletal (striated)
2
Q
When are type 1, type 2a and 2B muscle fibres used?
A
Type 1 - aerobic exercise
2a - mixture of both
2B - anaerobic exercise
3
Q
Which fibres allow more powerful contraction and why?
A
Type 2B - respire anaerobically, so produce energy quickly, although inefficient
4
Q
Why are type 2B fibres white?
A
Lack of myoglobin due to mainly respire anaerobically
5
Q
What type of athlete would have mainly type 2B muscle fibres?
A
Powerlifters
6
Q
Why are type 1 fibres adapted to aerobic respiration?
A
High in myoglobin and mitochondria
Less fibres to a motor unit - less power and more precision
7
Q
What type of athlete would have many type 1 fibres?
A
Marathon runners
