Constant means non-changing, so constant would refer to something that stays the same, does not change.
So the correct answer is this one: the quantity that must remain the same
<span>Her intestinal contents became hypertonic solution to her blood. Her blood became hypotonic solution to her intestinal contents. In hypertonic solution the total substance concentration of all dissolved solute is greater than the concentration in a cell. In hypotonic solution the substance concentration of all dissolved solute is less than that of a cell.</span>
False,
In order to start labor, estrogen increases and progesterone decreases.
Estrogens are a class of hormones that are essential for women's healthy sexual and reproductive development. They are sex hormones as well. The majority of estrogen hormones are produced by a woman's ovaries, however minor quantities are also produced in modest amounts by the adrenal glands and fat cells.
Progesterone is a member of the progestin drug class (female hormones). By lowering the level of estrogen in the uterus, it functions as a component of hormone replacement treatment. By substituting for the natural progesterone that some women lack, it helps to initiate menstruation.
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