QuestionSBA
QuestionChoice
Although type 2B muscle fibres produce fast and powerful movements, the best answer would be an increase in both the muscle diameter and several types 2 myosin fibres.
10004323
c
Increase in the number of type 2B myosin-containing cells
QuestionChoice
This is correct. Type 2 muscle fibres, also known as "fast-twitch" muscle fibres, are used during short and explosive periods of physical activity such as weight lifting. They are responsible for producing faster and stronger movements. As a result, training by lifting heavy weights will increase the muscle diameter and the number of these fibres.
10004321
a
Increased muscle diameter and number of type 2 myosin fibres
QuestionChoice
This is incorrect. Type 1 muscle fibres, also known as "slow-twitch" muscle fibres, are responsible for producing slower and less forceful movements, ideal for long, aerobic activities. Training by lifting heavy weights requires type 2 muscle fibres which produce fast and explosive movements.
10004322
b
Increased muscle diameter and number of type 1 myosin fibres
QuestionChoice
This answer is not the best answer from the options. Training using heavy weights would increase both the muscle diameter and several types 2 myosin fibres.
10004324
d
Increase in the muscle diameter
QuestionChoice
This answer is not the best answer from the options. Training using heavy weights would increase both the muscle diameter and several types 2 myosin fibres.
10004325
e
Increased muscle cell number and diameter
Concept
Chapter
2693
4266
Muscle fibres
Topic
190
Musculoskeletal
13411
A 17-year-old male sprinter starts training by lifting heavy weights at the gym.

Over time, what changes will happen to the muscles that he is using when lifting weights?
a