In vertebrates, the initiation of the nervous system is called _______, and it is an example of _______.
A) neurulation; organogenesis
B) gastrulation; organogenesis
C) axis formation; body segmentation
D) notochord formation; organization
E) neurulation; blastula formation

Question

Quizplus · Accepted Answer

Neurulation is the process by which the neural plate forms and folds inwards to create the neural tube, which will eventually give rise to the brain and spinal cord. This represents the initiation of the nervous system and is an example of organogenesis, which is the formation of organs from embryonic tissue. Option B (gastrulation) is the formation of the three germ layers (ectoderm, mesoderm, endoderm), which occurs before neurulation. Option C (axis formation) and option D (notochord formation) are important early events in embryonic development, but they do not directly relate to the initiation of the nervous system. Option E (blastula formation) is an early stage in embryonic development when the zygote undergoes rapid cell division, before the formation of the germ layers.

In Vertebrates, the Initiation of the Nervous System Is Called