How do stimulant and depressent drugs affect the nervous system? Give an example of each.

They affect the nervous system by reducing the function and activity.

Explanation:

Depressants are used by doctors to decrease central nervous system functions. Stimulants are drugs that raise nervous and physiological actions in the body.

Explanation:

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.