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Precursor cells
Precursor cells Or progenitor cells - In fetal or adult tissues, these are partially differentiated cells that divide and give rise to differentiated cells.
RELATED TERMS--------------------------------------
Fetal
Having to do with the fetus.
Differentiated
Having developed into a specialized cell or tissue type
.
SIMILAR TERMS--------------------------------------
Precedex
Precedex is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): dexmedetomidine.
Precef
Precef is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): ceforanide.
Preconscious
Thoughts that are not in immediate awareness but that can be recalled by conscious effort.
Precose
Precose (acarbose) is a drug for the treatment of type 2 (non-insulin dependent) diabetes.
PREVIOUS AND NEXT TERMS--------------------------------------
Postural tremor
A tremor of a limb that increases when the limb is stretched.
Peak Expiratory Flow (PEF)
A measurement of lung function, established by the patient's blowing into a special device. The higher the number recorded, the better the lung function. PEF is dependent on the severity of the disease, gender, age and height. A lower reading than expected may be caused by an allergy.
Pollen
Pollen is the male fertilising agent of flowering plants, grasses, trees and weeds.
Provocation test
Also called a challenge test. A test performed on eyes, nose or lungs and used to diagnose an allergy or monitor the effect of e.g. specific allergy vaccination. The allergen is introduced in increasing doses to the organ to see if the person reacts and, if so, at what level of exposure.
Pluripotent stem cells (PSCs)
Stem cells that include in their progeny all cell types that can be found in a postimplantation embryo, fetus, or developed organism.
Precursor cells
Progenitor cells
Or precursor cells. In fetal or adult tissues, these are partially differentiated cells that divide and give rise to differentiated cells.
Preimplantation embryo
The very early, free-floating embryo, from the time the egg is fertilized (zygote) until the beginning of implantation (in humans, a period of about 6 days). Also includes embryos resulting from nuclear transfer, in all the developmental stages through the blastocyst stage.
Preimplantation screening
Or preimplantation genetic diagnosis (PGD) - Before an in vitro-fertilized embryo is implanted in a woman's uterus, it can be screened for specific genetic mutations that are known to cause particular genetic diseases or for chromosomal abnormalities. One or more cells are removed from the preimplantation embryo for testing.
Preimplantation genetic diagnosis (PGD)
Or preimplantation screening. Before an in vitro-fertilized embryo is implanted in a woman's uterus, it can be screened for specific genetic mutations that are known to cause particular genetic diseases or for chromosomal abnormalities. One or more cells are removed from the preimplantation embryo for testing.
Prenatal diagnosis
Detection of abnormalities and disease conditions while a fetus is developing in the uterus. Many techniques for prenatal diagnosis, such as chorionic villus sampling and amniocentesis, require sampling placental tissue or fetal cells found in the amniotic fluid or fetomaternal circulation. Others, such as ultrasonography, can be performed without cell or tissue samples.
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