The fluctuating levels of estrogens and progesterone make women emotional before menstruation.
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Q268: Androgens are feminizing hormones that bring about
Q269: Endorphin levels decrease considerably when an animal
Q270: Cortisol produced by the outer part of
Q271: Serotonin levels will decrease after a protein-rich
Q272: Progesterone contributes to the growth and maintenance
Q274: Norepinephrine may be considered either a neurotransmitter
Q275: Most endorphins act by limiting or prolonging
Q276: A loss of cells that produce norepinephrine
Q277: Melatonin helps to regulate daily biological rhythms
Q278: People with Alzheimer's disease lose brain cells
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