Question

cytoplasm
intermembrane space
h+
h+
h+
h+
h+
high h+
e-
e-
nadh
nad+
fadh2
fad
o2
h2o
atp synthase
adp
atp
h+
matrix
the answer nadh and fadh2 will drop their supply of answer off at the etc the answer from the hydrogen will be removed and passed down the answer .nad+ and fadh will then return to answer to do it all again.
electron shuttles polymer hydrogen etc protons electrons helium glycolysis, pyruvate mod, and the cac acetyl coa

Explanation:

NADH and FADH2 are electron - shuttles. They donate electrons at the electron - transport chain (ETC). The electrons from hydrogen are passed down the ETC. Protons are pumped across the membrane creating a gradient. NAD+ and FAD return to glycolysis, pyruvate modification, and the citric acid cycle (CAC) to be reused.

Answer:

electron shuttles, electrons, ETC, protons, glycolysis, pyruvate mod, and the CAC