the resting membrane potential of a typical animal cell arises predominantly through the action of the na-k pump, which in each cycle transfers 3 na ions out of the cell and 2 k into the cell, leaving an excess of negative charges inside the cell.
two key molecular events during one cell cycle are :
during treadmilling, actin subunits ad
mitogens are added to the medium of cultured human cells that are synchronized in mitosis. the mitogen is washed way after these cells have passed the restriction point in the cell cycle. these cells will progress through the cell cycle then arrest in which phase?
type i membrane proteins have all of the following properties except
which of the following is false regarding the stem cells located in the epithelium lining of the all intestine? a.they express b-catenin b.lgr5 encodes the r-spondin protein c.the lgr5 gene is induced by wnt signaling d.they are located in pits called crypts