muscle fibres

Question 1

what are aerobic athletes?

Answer 1

athletes who use oxygen to power their activity
- more slow twitch fibres

ex) cross-country skiing

Question 2

what are anaerobic athletes?

Answer 2

athletes who use force to power their activity
- more fast twitch fibres

ex) sprinter

Question 3

what are 3 types of muscle contractions?

Answer 3

1. concentric
   - muscle shortens
2. eccentric
   - muscle lengthens
3. isometric
   - no change in length

Question 4

what are 3 types of muscle fibres?

Answer 4

1. slow twitch
   - resists fatigue, built for endurance
   - small fibres
   - 2 fuels (energy and fat)
   - more mitochondria

2b. fast twitch
- large fibres

2a. intermediate
- has strength and endurance

Question 5

what are the 4 types of contraction waves?

Answer 5

1. twitch
   - 1 stimulus, 1 contraction
2. wave summation
   - repetitive stimulus
3. unfused tetanus
4. fused tetanus
   - sustained contraction
   - ex) walking

Question 6

what is a dependent variable?

Answer 6

a variable that cannot happen without the independent variable

Question 7

what is an independent variable?

Answer 7

the variable located on the x-axis