Glycolysis and the citric acid cycle comprise two different sets of oxidation reactions. thereaction sequence for glycolysis is linear, whereas the reaction sequence for the citirc acid cycle forms a circle. how does this difference in the arrangement of reactions influence the rate of these processes when an excess amount of a single intermediate is added?

I think that when an excess amount of one intermediate is added to the citric acid cycle, it will cause an increase in all the intermediates, this is because it will be continuously cycled through the cycle. On the other hand, if one intermediate is added to the process of glycolysis, there will be no increase in all the intermediates as the process ends once the two pyruvates molecules are formed. The intermediate will thus, build up and will not be cycled to form more product. 

tronco encefálico

Explanation:

El tronco del encéfalo, que se coloca por encima de la médula espinal, es responsable de nuestros impulsos y comportamientos instintivos, y la corteza prefrontal es el área del cerebro que controla la manifestación de nuestros impulsos.