Awoman in preterm labor at 30 weeks of gestation receives two 12-mg doses of betamethasone intramuscularly. the purpose of this pharmacologic treatment is to:
a. stimulate fetal surfactant production.
b. reduce maternal and fetal tachycardia associated with ritodrine administration.
c. suppress uterine contractions.
d. maintain adequate maternal respiratory effort and ventilation during magnesium sulfate therapy.

Stimulate fetal surfactant production.

answer:

the water molecules are transferred from the roots to the stem or top parts of the tall tree because of important properties of water which are adhesion, cohesion and capillary action. cohesion is the property of water molecules keeps water molecules in a combined state by sharing of bonds between them at the atomic level. adhesion allows the interaction of water molecules with other substances or substrate. adhesion will cause the attachment of water molecules to the wall of the vessel (xylem) of the plant. capillary action occurs when the adhesive force to the vessel wall is stronger than the cohesive force between water molecules. capillary action mimics the transfer of water from a tube or pipe. in this way water utilizes its property to transfer water from down to top level of the plant.