Which class of drugs is characterized by breathable chemical vapors that produce mind-altering effects?

The breakdown of peptides into amino acids is an example of . the release of insulin after eating a large meal is an example of .

Based on the chart, what are the three most effective methods to protect against pregnancy?

1. controls how much sugar is in the blood pancreas 2. controls the other glands pituitary gland 3. manufactured by the brain to relieve pain thyroid 4. gland that regulates the body's energy levels endorphins