The role of parathyroid hormone is to regulate the concentration of Ca2+ in ECF.

TLS Online TPP Program

#Id: 6987

#Unit 5. Developmental Biology

Cell potency is a cell’s ability to differentiate into other cell types. Stem cell has the power, or potency, to produce many different types of differentiated cells.

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#Id: 6988

#Unit 5. Developmental Biology

The potency of a cell is an intrinsic property and is greater than or equal to its fate. Potency is described as the gene activation potential within a cell which begins with – 

Totipotency, Pluripotency, Multipotency  and finally Unipotency.

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#Id: 6989

#Unit 5. Developmental Biology

Totipotency

the ability of a single cell to divide and produce all of the differentiated cells in an organism (embryonic and extra embryonic cells).

Eg- spores and zygotes 

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#Id: 6990

#Unit 5. Developmental Biology

Pluripotency A stem cell that has the potential to differentiate into any of three germ layers(endoderm , mesoderm & ectoderm). Eg-all embryonic cells

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#Id: 6991

#Unit 5. Developmental Biology

Multipotency

A stem cell can differentiate into a number of cell types but only those a closely related family of cells.

Eg- Hematopoietic stem cells

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#Id: 6992

#Unit 5. Developmental Biology

Unipotency

A unipotent cell that one stem cell has the capacity to differentiate into one cell type Eg- spermatogonia