The chorion ________ and the amnion ________.
A)is the outer protective membrane around the embryo; is the site where an embryo is implanted into the uterus
B)projects into the endometrium and helps form the placenta; is a membrane that encircles a developing embryo
C)is the site from which primary germ layers develop; is the site from which secondary germ layers develop
D)is the part of the blastocyst that is not the inner cell mass; is the inner cell mass

Question

The chorion ________ and the amnion ________.
A)is the outer protective membrane around the embryo; is the site where an embryo is implanted into the uterus
B)projects into the endometrium and helps form the placenta; is a membrane that encircles a developing embryo
C)is the site from which primary germ layers develop; is the site from which secondary germ layers develop
D)is the part of the blastocyst that is not the inner cell mass; is the inner cell mass

Quizplus · Accepted Answer

The chorion projects into the endometrium to help form the placenta, while the amnion is a membrane that encircles the developing embryo. Option A is incorrect because while the chorion is the outer protective membrane around the embryo, the amnion is not the site where an embryo is implanted into the uterus. Option C is incorrect because the primary and secondary germ layers are formed during gastrulation, which occurs prior to the formation of the chorion and amnion. Option D is incorrect because the inner cell mass is the part of the blastocyst from which the embryo develops, while the amnion is a membrane surrounding the embryo.

The Chorion ________ and the Amnion ________

The Chorion and the Amnion