Answer:
First blank: Chemical potential energy
Second blank: Kinetic energy
Third blank: Heat.
Step-by-step explanation:
Chemical potential energy is the energy for stored in the body system for work. It's stored inform of ions and these ions are released for biophysicochemical activities of the body.
However, the chemical potential energy is converted to kinetic energy, which is the energy for motion in the body.
Then, heat is lost to the external environment during conversation of chemical potential energy to kinetic energy (based on the law of thermodynamics).