Carbon monoxide has a density that is about 97% that of air under normal room temperature. So, to answer the question, no, it is lighter than air. You would think, then, that it would rise. In real-world conditions, there are a lot of forces that cause the CO to mix rather completely into the air.
Growth Hormones. Growth Hormones are responsible for the development function of the entire body. Growth Hormones are peptide hormones which encourages growth and cell regeneration in both humans and animals.
1 It is produced by the pituitary gland, a tiny organ at the base of the brain. 2  Growth hormone promotes growth of bone, cartilage, muscle, organs, and other tissues. 3  When there is too much growth hormone in the body, these tissues grow larger than normal.