An experimental treatment cultures stem cells from a newborn's umbilical cord. In a lab dish, the stem cells give rise to type II cells, which in turn give rise to more type I cells. These stem cells will be added to the extracellular matrix of a donated lung which has been stripped of its respiratory cells. How will the cells act after they grow in the donated lung?

Question

Quizplus · Accepted Answer

Type II cells are responsible for secreting surfactant, which reduces surface tension in the alveoli and helps keep them open for gas exchange. Type I cells form the thin structure of the respiratory membrane that allows for gas exchange between the alveoli and blood vessels in the lungs. Therefore, the type II cells will secrete surfactant and the type I cells will form the respiratory membrane in the alveoli.

An Experimental Treatment Cultures Stem Cells from a Newborn's Umbilical