Where would you start when describing the blood flow through the circulatory system? (mainly the heart) i need to know because i'm writing a paper about the blood flow of the circulatory system from the perspective of a red blood cell. 8th grade biology

U would start in the heart and make ur way through ur veins and capillaries and arteries then after making a huge figure eight type shape u will be on the other side of ur heart ur heart making a lub dub sound. this all happens in less than a minute

The awnser is b i believe

Answer:

it provides an alternative energy pathway for the reaction to proceed.

explanation:

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.