Based on the model of cellular transport, the hydrolysis of ATP to ADP provides a mechanism for A)
potassium ions to move with their gradient
B)
sodium ions to move against their gradient.
potassium ions to move into the cell via simple diffusion.
D)
sodium ions to move into the cell via facilitated diffusion.

Which of the following is an advantage of using embryonic stem cells in medical research? a. the use of embryonic stem cells is much less expensive than the use of adult stem cells. o b. no living tissue is damaged when scientists use embryonic stem cells. o c. embryonic stem cells are able to differentiate into a wider range of cells than adult stem cells. d. there is no controversy surrounding the use of embryonic stem cells.