Neurulation refers to the folding process in which the neural plate bends up and later fuses to form the hollow tube that will eventually differentiate into the brain and the spinal cord of the central nervous system. This process begins when the notochord induces the formation of the central nervous system by signaling the ectoderm germ layer above it to form the thick and flat neural plate. The neural plate folds in upon itself to form the neural tube, which will later differentiate into the spinal cord and the brain, eventually forming the central nervous system. It has different stages one is primary neurulation, in primary neurulation, the cells surrounding the neural plate direct the neural plate cells to proliferate, invaginate, and pinch off from the surface to form a hollow tube. So let's start this quiz and know more about Neurulation.
1. Which structure induces the formation of the neural tube?
A. Spinal cord
B. Neural folds
C. Epidermis
D. Neural crest
2. What induces the formation of the neural plate?
A. Contrast
B. Spinal cord
C. Organizer
D. None of these
3. When the neural tube is formed?
A. 6 to 8 weeks after conception
B. 1 to 6 weeks after conception
C. 4 to 6 weeks after conception
D. 4 to 9 weeks after conception
4. What induces the notochord?
A. Neural folds
B. Epidermis
C. Neural crest
D. Axial mesoderm
5. Which developmental process is most important for induction of the formation of the neural tube?
A. Teurulation
B. Neurulation
C. Gastrulation
D. None of these
6. How many stages are there of embryonic development?
A. Five
B. Four
C. Three
D. Seven
7. How many steps are there in the neurulation?
A. Five
B. Four
C. Six
D. Ten
8. Which of the following gives rise to the skin cells?
A. Contrast
B. Organizer
C. Spinal cord
D. Ectoderm
9. What mesodermal structure induces the neural plate?
A. Neural folds
B. Notochord
C. Epidermis
D. Neural crest
10. What is the purpose of neurulation?
A. Digestive system
B. Sympathetic system
C. Nervous system
D. None of these
11. How long does neurulation last in a human body?
A. 44 gestational days
B. 34 gestational days
C. 24 gestational days
D. 14 gestational days
12. Where does secondary neurulation occur?
A. Posterior section
B. Caudal section
C. Epidermis section
D. Notochord section
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