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which of the following substances stimulates contractions in uterine smooth muscle during labor? a.oxytocin b. prolactin...

which of the following substances stimulates contractions in uterine smooth muscle during labor?
a.oxytocin
b. prolactin
c. progesterone
d. estrogen

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Answer #1

Answer -a) oxytocin

oxytocin- hormone produced in the hypothalamus , secreted by posterior lobe of pitutary, it cause powerful contraction of uterine musscles during child birth.

estrogen- stimulate growth of egg follicle, maintain thicknessof vaginal wall and uterine lining. Prodeced by ovary

Progestrone- also produced by ovaries,Adrenal galnds and placenta can also prodece progesterone. It help the thickening of uterus during pregnancy.

Prolactin- secreted by anterior pitutary helps in the production of milk after child birth

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