Friday, October 26, 2007

Attention Year 2 Students

Closure of the neural tube occurs on around which day of embryonic life?

a) 26
b) 38
c) 56
d) 74
e) 90


Answers here please. Correct answer will be posted next week.

2 comments:

Anonymous said...

a) 26

Themis said...

The correct answer is A


As the neural tube forms, the closing process is critical, occurring from the cranial to the caudal end as the anterior neuropore closes around day 24, the posterior around day 26. This is a critical event, as defects in closure may result in spina bifida or other neural tube defects. The risk of a neural tube defect can be decreased by folic acid supplements.