Chemical Energy For Movement

ATP Molecule

Adenosine triphosphate

• one adenosine and a chain of three phosphate

What does ATP do?

it’s the chemical fuel that is responsible for every muscular contraction in your body

ATP and Energy

For skeletal muscle to pull on bones and create movement, CHEMICAL ENERGY is released from ATP molecules.

• The high energy chemical bonds between the last phosphate molecules split and release energy

• When this occurs ATP becomes ADP and an inorganic phosphate (Pi) → Adenosine diphosphate and Pi

ATP → ADP

ATP constantly cycles between a loaded and unloaded form.

Loaded [ATP]

the molecule is carrying energy that allows the skeletal muscles to contract

Unloaded [ADP+Pi]

The molecule does not have energy to provide the skeletal muscle cells to contract

ATP Resynthesis

To be able to continue to contract our muscles we need a constant and continuous supply of ATP.

So after ATP has transformed into ADP and energy has been released, a CHEMICAL REACTION occurs to return the phosphate molecule.

And the the ATP molecule breaks apart to create energy, thus creating a cycle

ATP Resynthesis + Energy systems

The resynthesis of ATP requires energy to occur. This energy is obtained through the breakdown of fuels or substrates via energy systems