F (symbol) A much used symbol, F stands for fractional concentration; free energy; Fahrenheit; visual field; fluorine; force; filial generation, followed by subscript numerals indicating specified matings such as F1); the amino acid phenylalanine; the coefficient of inbreeding , etc.
Focusing on certain aspects of current experience to the exclusion of others. It is the act of heeding or taking notice or concentrating.
Thermometer scale in which the freezing point of water is 32°F and the boiling point of water 212°F. The Fahrenheit scale is still obstinately in use in the US. This anachronism requires conversion from Centigrade (°C) to Fahrenheit (°F), and vice versa. One degree °C = (5/9)(°F - 32). One degree °F = (9/5)(°C) + 32.
A nonmetallic, diatomic gas that is a trace element and member of the halogen family. It is used in dentistry as flouride (FLUORIDES) to prevent dental caries.
1. In genetics, the first generation that results from the crossing of two parental lines, as the filial generation. 2. In general, pertaining to the relationship of children, both sons and daughters, to their parents.
An essential amino acid occurring in proteins. A small amount of phenylalanine is necessary in the diet to make the proteins that form human tissues.
The mating of plants or non-human animals which are closely related genetically.
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A building block of fat.
An opening between the atria of the heart that normally closes shortly after birth. An atrial septal defect may develop if the foramen ovale fails to close properly.
Free Mammary Artery Graft
When the surgeon removes the mammary artery from its origin to use as a bypass graft.
A destructive fragment of oxygen produced as a byproduct when cells use oxygen to burn fat.
F (coefficient of inbreeding)
F is the symbol for the coefficient of inbreeding, a way of gauging how close two people are genetically to one another. The coefficient of inbreeding, F, is the probability that a person with two identical genes received both genes from one ancestor.
A surgical procedure designed to make the face appear younger by pulling loose facial skin taut. With age or excessive sun exposure, wrinkled creased skin can develop on the face, neck or forehead along with fat deposits and folds around the jaws and jowls. While a facelift cannot stop the aging process, it may "turn back the clock" in appearance. Recovery time is usually 1 week, and the results last approximately 10 years. Additional procedures to supplement a facelift -- including necklift, blepharoplasty (eyelid surgery), liposuction, autologous fat injection, removal of buccal (cheek) fat pads, forehead lift, and browlift; chemical or laser peel; and malar (cheek), submalar, or chin implants -- may be necessary to achieve the desired results. Although they are infrequent, risks and complications of facelift surgery include bleeding; hematoma; bruising; infection; neurological dysfunction (loss of muscle function or sensation), which is usually temporary; widened or thickened scars; loss of hair around the incision site; asymmetry (unevenness between two sides); and skin necrosis (loss of skin due to tissue death).
Facelift surgery risks
Although infrequent, the risks and complications of facelift surgery include: bleeding, hematoma, bruising; infection; neurological dysfunction (loss of muscle function or sensation), which is usually temporary; widened or thickened scar; loss of hair (around the incision site), asymmetry (unevenness between two sides); and skin necrosis (loss of skin from tissue death).
Facial canal introitus
In anatomy, an introitus is an entrance, one that goes into a canal or hollow organ. The introitus of the facial canal is the entrance to the facial canal, a passage in the temporal bone of the skull through which the facial nerve (the 7th cranial nerve) travels.
One of the 43 muscles in the human face. The facial muscles convey basic human emotions such as anger, sadness, fear, surprise, disgust, contempt and happiness by very clear facial signals.
Facioscapulohumeral muscular dystrophy
A form of muscular dystrophy that typically begins before age 20 with slowly progressive weakness of the muscles of the face, shoulders, and feet. The severity of the disease is quite variable. Although most people with facioscapulohumeral muscular dystrophy (FSHD) retain the ability to walk, about 20% require a wheelchair. Life expectancy is not shortened. The diagnosis can be confirmed by a DNA test disclosing the deletion of copies of a repeat motif called D4Z4 on chromosome 4. FSHD is inherited in an autosomal dominant manner. Offspring of an affected individual have a 50% chance of inheriting the mutant chromosome 4. About 10-30% of cases are due to a new mutation. Prenatal testing is available.
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