Answer:
During the Krebs cycle, pyruvic acid is broken down into carbon dioxide in a series of reactions that give off energy. The high-energy electrons that are produced are picked up by a series of electron carriers, and the energy is used to convert ADP into ATP.
Explanation:
Answer:
When energy flows out of a system, it must all flow into the surroundings.
When energy flows out of a system, ΔEsystem is negative.
When energy flows into the surroundings, ΔEsurroundings is positive.
Therefore,
─ ΔEsystem= ΔEsurroundings
Answer:
A
Explanation:
Stretching of the atrium and ventricle muscles
