Depression what are the effects to the brain

Which step in naming unsaturated hydrocarbons is used for alkenes but not alkynes

This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?