Question

multiple choice question
respiratory system changes in a pregnant woman occur due to progesterone relaxing the smooth muscles surrounding the bronchi, as well as the _______ increasing in size and pushing up into the thoracic cavity.
uterus
kidneys
stomach
ovaries

Explanation:

During pregnancy, the uterus expands to accommodate the growing fetus. As it enlarges, it pushes upward into the thoracic cavity. Progesterone relaxes the smooth muscles around the bronchi. The other options (kidneys, stomach, ovaries) do not have the primary anatomical relationship of increasing in size during pregnancy and pushing into the thoracic cavity in the same way as the uterus.

Answer:

uterus