19) Which cellular organelle is represented by the diagram below?
lipid
molecules
protein
molecules
A)
molecules
B)
cell wall
C)
cell membrane
D)
protein

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.