Question

multiple choice question
smooth muscle relaxation, caused by progesterone, can lead to ______ in the mother because her esophageal sphincter is relaxed and stomach contents may enter the esophagus
o heartburn
o braxton-hicks
o constipation
o diarrhea

Explanation:

When the esophageal sphincter relaxes due to progesterone - induced smooth muscle relaxation, stomach acid (contents) can reflux into the esophagus. Heartburn is a common symptom caused by this acid reflux. Braxton - Hicks are uterine contractions. Constipation is related to slowed intestinal motility (also due to progesterone in some cases, but not directly to esophageal sphincter relaxation). Diarrhea is the opposite of constipation and not related to this esophageal - sphincter - relaxation mechanism.

Answer:

heartburn