4. Nerve cells, called neurons, in our brain and nervous system communicate with each other using a process called neurotransmission. Which of the following is/are true?
O a. Drugs affect the brain by enhancing and assisting the neurotransmission process
O b. Drugs affect the brain by interfering with the neurotransmission process
O c. Alcohol has little effect on the way neurons transmit messages
O d. Drugs have insignificant effect on the way neurons receive messages

c

explanation:

1. what is the relationship between the shape of an enzyme and the reactions they catalyze?

2. how does an enzyme inhibitor work?

separate your answers so i dont get confused : )

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

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.