3. During embryonic neurulation, which of the following statements is NOT correct?
(A) Neurulation begins as cells from the dorsal ectoderm form the notochord.
(B) Sonic hedgehog (SHH) secreted by the notochord is involved in the formation of the neural plate.
(C) Neural plate curves inward to form the neural tube.
(D) Spina bifida is a type of neural tube defect.
(E) Vitamin B9deficiency is associated with neural tube defects.
答案:登入後查看
統計: A(1), B(1), C(1), D(0), E(0) #3847719
統計: A(1), B(1), C(1), D(0), E(0) #3847719