TYPES OF SKELETAL MUSCLE FIBRES

Question 1

What color are slow fibers?

Answer 1

Red due to numerous mitochondria and myoglobin

Question 2

What is the diameter for slow fibers?

Answer 2

Narrow diameter

Question 3

What is the difference between slow and fast fibers?

Answer 3

Slow fibers last for longer and resistant to fatigue, but less powerful contractions

Question 4

Is ATP produced in slow fibers?

Answer 4

Yes, ATP produced by mitochondria through aerobic metabolism (needs oxygen)

Question 5

What are the capillaries like in slow fibers?

Answer 5

More extensive network of capillaries

Question 6

Where are slow fibers found?

Answer 6

In the enlarged soleus muscle in the leg of a long distance runner

Question 7

What color are fast fibers?

Answer 7

White

Question 8

What is the diameter like for fast fibers?

Answer 8

Large diameter

Question 9

What is the difference between fast and slow fibers?

Answer 9

Fast fibers have rapid and powerful contractions, but fatigue rapidly

Question 10

How is ATP produced in fast fibers?

Answer 10

ATP generated by anaerobic glycolysis (use stored glycogen and do not require oxygen)

Question 11

Where are fast fibers found?

Answer 11

In enlarged gastrocnemius muscle in the leg of a sprinter