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q30 (last one) - raji_321
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#1
01-24-2008, 09:08 AM
The notochord forms on approximately what day after conception?
A. Day 2
B. Day 7
C. Day 17
D. Day 28
E. Day 60
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#2
01-24-2008, 09:09 AM
C??
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#3
01-24-2008, 09:10 AM
Thank you raji...
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#4
01-24-2008, 09:11 AM
yep cc third week closes by 25 /27 days
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#5
01-24-2008, 09:11 AM
bb?
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#6
01-24-2008, 09:11 AM
C
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#7
01-24-2008, 09:12 AM
The correct answer is C. Formation of the notochord is a third week event, occurring as a relatively early part of development of the trilaminar disc. More specifically, notochord formation begins about day 16 and the neuroenteric canal forms on about day 18.

Two days after conception (choice A), implantation has not yet occurred. by seven days after conception (choice B), the blastocyst has usually implanted in the endometrium.

By day 28 (choice D), gastrulation has occurred, and organogenesis is under way.

By day 60 (choice E), organogenesis is complete.
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