why does skeletal muscle require more atp than many other tissues in the body ?
ID: 168836 • Letter: W
Question
why does skeletal muscle require more atp than many other tissues in the body ?
A. the contraction cycyle reuires ATP B. the sarcoplasmic reticulum uses ATP to pump in calcium ions from the cytosol C. rigor mortis can only occur when ATP is plentiful D. both A and B E. A,B and C
a Skeletal muscle fiber can produce ATP in a variety of ways ( metabolic pathways ) however on e method produces enough ATP to support physical activity for many hours. which statement below is correct about this pathway? A. this is the pathway that produces lactic acid B. This is the pathway that uses creatine phonsphate to convert adp to atp C. this pathway is anaerobic (does not require o2) D. this pathway is aerobic E. this is the pathway that produces lactic acid and is anaerobic.
Explanation / Answer
1. ANS: D. both A and B
Explanation:
Myosin and actin actually cause contraction of muscle fibers. The contraction of muscles requires huge amounts of ATP. The myosin head hydrolyzes ATP into ADP & phosphate.
The sarcoplasmic reticulum uses ATP to pump in calcium ions from the cytosol because it reduce the calcium level around the actin and myosin filaments and allowing the muscle to relax.
2. ANS: C. this pathway is anaerobic (does not require o2)
Explanation:
Aerobic cellular respiration, which is a very efficient method of production of ATP and a method of ATP production that can be sustained for long periods of time.
Ex: when running a race that takes several hours to complete.
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