nbme 5 question

[firstaid2012]

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35. A 16-year-old boy participates in a study of exercise and muscle hypertrophy. After a pre-training biopsy specimen of the quadriceps muscle is obtained, he begins a weight-lifting program to increase the mass and strength of the muscle. After 3 months of training, a second muscle biopsy specimen is taken for histologic assessment of skeletal muscle characteristics. Compared with the pre-training sample, the post-training sample is most likely to show which of the following findings?

Number of Actin Total number Mitochondria per Myocte # of Myoctes

A) ↑ ↑ ↑
B) ↑ ↑ no change
C) ↑ no change ↑
D) ↑ no change no change
E) no change ↑ ↑
F) no change ↑ no change
G) no change no change ↑
H) no change no change no change

can someone explain

 

[firstaid2012]

anyonee???

 

[Big Baller]

35. A 16-year-old boy participates in a study of exercise and muscle hypertrophy. After a pre-training biopsy specimen of the quadriceps muscle is obtained, he begins a weight-lifting program to increase the mass and strength of the muscle. After 3 months of training, a second muscle biopsy specimen is taken for histologic assessment of skeletal muscle characteristics. Compared with the pre-training sample, the post-training sample is most likely to show which of the following findings?

Number of Actin Total number Mitochondria per Myocte # of Myoctes

A) ↑ ↑ ↑
B) ↑ ↑ no change
C) ↑ no change ↑
D) ↑ no change no change
E) no change ↑ ↑
F) no change ↑ no change
G) no change no change ↑
H) no change no change no change

can someone explain

The answer is B because #of actin goes up due to hypertrophy and increased demand of force. Mitochondira increases because the body needs more energy as Mitochondria produces atp and myocytes remain unchanged as this is hypertrophy and not hyperplasia.

 

[firstaid2012]

The answer is B because #of actin goes up due to hypertrophy and increased demand of force. Mitochondira increases because the body needs more energy as Mitochondria produces atp and myocytes remain unchanged as this is hypertrophy and not hyperplasia.

wouldn't mitochondria be the same because its a fast twitch muscle and this is anaerobic.