I think the third one is the answer
The subatomic particle you are looking for is the answer of an electron Force you're 100% right
The fibrous skeleton of the heart
functions in all of the ways listed in the option, except causing direct spread
of electrical impulses from the atria to the ventricles. The fibrous skeleton
in fact supports proper coordination of atrial and ventricular contractions by
blocking direct spread of electrical impulses from atria to ventricles.
Answer;
Neutralization of free radicals
Explanation;
-Peroxisomes are small vesicles found around the cell. They have a single membrane that contains digestive enzymes for breaking down toxic materials in the cell. They differ from lysosomes in the type of enzyme they hold. Peroxisomes hold on to enzymes that require oxygen (oxidative enzymes).
-The oxidative enzymes that break down fatty acids and amino acids, resulting in, among other things, the production of the toxic substance, hydrogen peroxide.
