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.
Pelvic floor disorders occur when the sling or hammock that supports the pelvic organs becomes weak or damaged. The three main types of pelvic floor disorders are: 1  Urinary incontinence, or lack of bladder control.  Fecal incontinence, or lack of bowel control.