Question

Which of the following is NOT true of the stratum basalis?

A) It is the permanent layer of the endometrium and it gives rise monthly to the stratum functionalis after each menstruation.
B) It is supplied with blood by the spiral arterioles.
C) It is the layer of the endometrium closest to the myometrium.
D) None of these choices; i.e., all are true.

Answer 1

The stratum basalis is the permanent layer of the endometrium, but it does not give rise to the stratum functionalis. It is supplied with blood by the spiral arterioles and is the layer closest to the myometrium.

Step-by-step explanation:

The stratum basalis is the permanent layer of the endometrium, but it does not give rise to the stratum functionalis after each menstruation. Instead, it is the stratum functionalis itself that thickens and sheds during the menstrual cycle. The stratum basalis is supplied with blood by the spiral arterioles, and it is the layer of the endometrium closest to the myometrium.

Therefore, the correct answer is A) It is the permanent layer of the endometrium and it gives rise monthly to the stratum functionalis after each menstruation.