PHYSIOLOGY
MUSCLE CONTRACTION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
During the first few minutes of exercise, the exercising muscle uses different energy sources to produce the ATP molecules necessary for contraction. Given the following sources of ATP production:anaerobic respiration aerobic respiration phosphagen system Choose the arrangements that lists the energy sources in the order they are used (fastest to slowest)
|
|
1, 2, 3
|
|
|
1, 3, 2
|
|
|
2, 1, 3
|
|
|
2, 3, 1
|
|
|
3, 1, 2
|
Explanation:
Detailed explanation-1: -The first 10 to 20 seconds of high-intensity physical activity is fueled by the “ATP-CP, ‘’ also known as the phosphagen energy system. Once the available ATP is used up, which occurs in a few seconds, a molecule called phosphocreatine is used to re-form ATP in the muscle.
Detailed explanation-2: -The source of energy that is used to power the movement of contraction in working muscles is adenosine triphosphate (ATP) – the body’s biochemical way to store and transport energy. However, ATP is not stored to a great extent in cells. So once muscle contraction starts, the making of more ATP must start quickly.
There is 1 question to complete.