During menses,
A)progesterone levels are high.
B)a new uterine lining is formed.
C)secretory glands and blood vessels develop in the endometrium.
D)the old functional layer is sloughed off.
E)the corpus luteum is most active.

Question

Quizplus · Accepted Answer

During menses, the old functional layer of the endometrium is sloughed off. This shedding of the uterine lining is what causes the bleeding experienced during menstruation. Progesterone levels are low during this time as the corpus luteum has already degenerated. The development of secretory glands and blood vessels in the endometrium and the formation of a new uterine lining occur during the proliferative phase of the menstrual cycle, which follows menses.

During Menses