Fentanyl is in a class of drugs called opioid analgesics, which work by binding to nervous system proteins called opioid receptors, thereby blocking the transmission of pain signals to the brain.Duragesic is a transdermal (through-the-skin) patch.entanyl skin patches are only used to treat people who are tolerant (used to the effects of the medication) to narcotic pain medications. Fentanyl is in a class of medications called opiate (narcotic) analgesics. It works by changing the way the brain and nervous system respond to pain.
Answers. Best Answer: 1 anisogamy (reproduction by the union or fusion of two differing gametes (especially differing in size) 2 Gonad is the generic term for either testes or ovaries 3 Gametes are haploid 4 Disease and disorders are passed on.
Osteogenesis Imperfecta in Children. Osteogenesis imperfecta (OI), also known as brittle-bone disease, is a genetic (inherited) disorder characterized by bones that break easily without a specific cause.An estimated 20,000 to 50,000 people in the U.S. have this disease. OI can affect males and females of all races.he cause of OI is believed to be because of a genetic defect that causes imperfectly formed or an inadequate amount of bone collagen, a protein found in the connective tissue. The following are the most common symptoms for OI. However, each child may experience symptoms differently.