NEET BIOLOGY

HUMAN PHYSIOLOGY

LOCOMOTION AND MOVEMENT

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The energy for muscle contraction is most directly obtained from-
A
Phosphocreatine
B
ATP
C
Anaerobic respiration
D
Aerobic respiration
Explanation: 

Detailed explanation-1: -The energy is derived from adenosine triphosphate (ATP) present in muscles. Muscles tend to contain only limited quantities of ATP. When depleted, ATP needs to be resynthesized from other sources, namely creatine phosphate (CP) and muscle glycogen.

Detailed explanation-2: -During contraction the energy of muscle tissue increases due to energy from the hydrolysis of ATP.

Detailed explanation-3: -Adenosine triphosphate (ATP) is the sole fuel for muscle contraction. During near maximal intense exercise the muscle store of ATP will be depleted in < 1s, therefore, to maintain normal contractile function ATP must be continually resynthesized.

Detailed explanation-4: -The energy required for muscle contraction is provided by the breakdown of ATP but the amount of ATP in muscles cells is sufficient to power only a short duration of contraction.

Detailed explanation-5: -Muscle contraction occurs via metabolism of adenosine triphosphate (ATP) derived primarily from the simple sugar glucose.

There is 1 question to complete.