The chemical inside the brain that is associated with the emotion "sadness" is the same as that found in the barbiturate drug called "downers." true or false?

In multiple sclerosis, the immune system destroys the substance that coats and protects nerve fibers in the brain and spinal cord. this causes inflammation and injury to the nerves, and the axons don't conduct impulses as well.

What does cooper mean when she says “…non-nutrient foods are really, really cheap which is why i say it’s a social justice issue.” (7: 50 in video)

Desiree has a scientific question that she wants to investigate. she has developed a hypothesis and method for her experiment. which step of scientific inquiry should desiree take next? desiree should present her findings to her teacher and classmates. desiree should collect data, which may support or refute her hypothesis. desiree should provide an explanation for her results.