Question

A muscle with higher SR density would require a lower frequency of activation to achieve a tetanic contraction

BECAUSE
The muscle relaxation would be slower
Question options:
- TRUE AND TRUE
- TRUE AND FALSE
- FALSE AND TRUE
- FALSE AND FALSE

Answer 1

The muscle with higher sarcoplasmic reticulum density would not require a lower frequency of activation to achieve tetanus, nor would it have slower relaxation; both statements are false.

Step-by-step explanation:

Assessing if a muscle with higher sarcoplasmic reticulum (SR) density requires a lower frequency of activation to achieve tetanus due to slower muscle relaxation involves understanding the mechanisms of muscle contraction and relaxation. The statement "A muscle with higher SR density would require a lower frequency of activation to achieve a tetanic contraction" is FALSE.

Higher SR density facilitates faster calcium uptake after a contraction, which can quicken relaxation speed, not slow it down, and this does not directly relate to the frequency required to achieve tetanus. The second statement "The muscle relaxation would be slower" is likewise FALSE. Muscles with more SR can pump calcium back more quickly, potentially speeding up relaxation. Therefore, the correct response is FALSE AND FALSE.