Which tissues below are typically derived from the epithelium on the dorsal surface of a mammalian embryo once some of these cells begin expressing N-cadherins and stop expressing E-cadherins?
A)skin
B)only brain
C)only spinal cord
D)only neural tube
E)brain, spinal cord and neural tube

Question

Quizplus · Accepted Answer

The neural tube, which gives rise to the brain and spinal cord, is derived from the ectoderm on the dorsal surface of the mammalian embryo. Once some of these cells start expressing N-cadherins and stop expressing E-cadherins, they form the neural crest cells, which give rise to various tissues including neurons and glia in the brain and spinal cord. Therefore, the correct answer is E, which includes brain, spinal cord, and neural tube. Skin is not derived from the neural tube or its derivatives and is therefore not included in the answer.

Which Tissues Below Are Typically Derived from the Epithelium on the Dorsal