Bio question

[Dor17]

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i was confused about one thing...
which one develops into central nervous system?
Neural tube or ectoderm?

I remember reading neural plate-> neural groove->Neural tube->central nervous system in ap cliffs bio
but when I took ADA sample exam, the question's answer key said it was ectoderm...

which one is right?😕

 

[eunguyen]

I got this from wiki

"In vertebrates, the first sign of the nervous system is the appearance of a thin strip of cells along the center of the back, called the neural plate. The inner portion of the neural plate (along the midline) is destined to become the central nervous system (CNS), the outer portion the peripheral nervous system (PNS). As development proceeds, a fold called the neural groove appears along the midline. This fold deepens, and then closes up at the top. At this point the future CNS appears as a cylindrical structure called the neural tube, whereas the future PNS appears as two strips of tissue called the neural crest, running lengthwise above the neural tube. The sequence of stages from neural plate to neural tube and neural crest is known as neurulation."

i dunno either. ectoderm is more general and neural tube is more detail.

 

[jon62690]

As I understand, the central nervous system, with all of its developmental tissues such as the neural plate, neural tube, etc, are all derived from the ectodermal germ layer during embryonic development.

So I guess you could also say Ectodermal cells > neural plate > neural groove > neural tube > CNS.

Please correct me if I'm wrong,