Question

A by product of involuntary muscle contraction and relaxation is
A) Oxygen
B) Water
C) Heat
D) Nitrogen

Answer 1

A by product of involuntary muscle contraction and relaxation is
A) Oxygen
B) Water
C) Heat
D) Nitrogen

=> Heat

Answer 2

Here is your answer :

Any product of involuntary muscle contraction and relaxation is

C) Heat