Maria is in her ninth month of pregnancy. She begins to feel contractions, but when she gets up and walks around, the contractions go away. Most likely, she has experienced which of the following?

What does the text describe as "a blanket of fat wrapped around the main part of the neuron that serves the function of keeping the brain's electrical signals on one path and increasing their speed"?

a. synapse b. lipids c. cortex d. myelin

Surveys have found that up to ___ of high school students say they are unsure of their sexual identity

A) 5% B) 10% C) 15% D) 25%