What would be the priority when caring for a primigravid client whose cervix is dilated at 8 cm when the fetus is at 1+ station and the client has had no analgesia or anesthesia?

The priority would be "Offering encouragement and support."

Explanation:

There are others who don't dilate even 24 hours before birth. 4 For starters, the exam doesn't factor in labor and positioning. In early labor  those days to possibly weeks before it's time to go to the hospital  your cervix will dilate up to 6 cm; by active labor it will increase to about 7 to 8 cm. Full cervical dilation  when your cervix measures 10 cm  occurs at the end of the transitional phase, the last of the three phases of labor.

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.