Question
22. Which statement does NOT describe external
regulatory proteins?
a. They respond to events occurring inside a cell.
b. Growth factors are one group of external
regulatory proteins.
c. They can speed up or slow down the cell cycle.
d. Some can cause cells to slow down or stop their
cell cycles.
to the wounded area and f
a blastema--a growing ma
undifferentiated cells.
Week 5:
Redifferentiatio
Cells in the blaste
redifferentiate an
the tissues neede
mature limb. The
Answer
A. They respond to events occurring inside a cell.