If the resting potential of a cell is -90 mV, what might its membrane potential become if potassium channels in the plasma membrane open? A. -100mV
B. -90 mV
C. -80 mV
D. 0mV
E. more than one of the above are possible

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.

the correct answer is 2 and 4