The vasoconstriction is due to serotonin, histamines & other vasoconstrictors liberated from platelets that adhere to the walls of the damaged vessels.

TLS Online TPP Program

#Id: 6999

#Unit 5. Developmental Biology

Unlike pluripotent stem cells, adult or multipotent stem cells in culture not only have a restricted array of cell types that they can create, but they also have a finite number of generations for self-renewal.

TLS Online TPP Program

#Id: 7000

#Unit 5. Developmental Biology

Limited renewal of adult stem cells may contribute to aging..

TLS Online TPP Program

#Id: 7001

#Unit 5. Developmental Biology

When a multipotent stem cell divides asymmetrically, its maturing daughter cell often goes through a transition stage as a progenitor or transit-amplifying cell, as is seen in the formation of blood cells, sperm, and neurons.

TLS Online TPP Program

#Id: 7002

#Unit 5. Developmental Biology

Progenitor cells are not capable of unlimited self-renewal; rather, they have the capacity to divide only a few times before differentiating.

TLS Online TPP Program

#Id: 7003

#Unit 5. Developmental Biology

Although limited but Progenitor cells proliferation serves to amplify the pool of progenitors before they terminally differentiate.

TLS Online TPP Program

#Id: 7004

#Unit 5. Developmental Biology

Cells within progenitor pool can mature along different but related paths of specification.