Which of the following best explains why most chemical reactions proceed more quickly when the concentrations of reactants are i
ncreased? The increased concentration increases the number of collisions between molecules.
The products of chemical reactions are more stable at higher concentrations.
At higher concentrations, reactant molecules move more quickly.
At higher concentrations, product molecules are able to catalyze the reaction.
The answer that best fits the blank provided above is C3a and C5a. Mast cells release this so called histamines once they are exposed to C3a and C5a which are fragments of complement proteins. These are also called as <span>Anaphylatoxins along with C4a. Hope this helps.</span>
