The main signaling molecules that are very active in the caudal l. primitive region: A. Crypto B. Chordin C. All mentioned D. Vg3 E. Epiblast F. Amnion G. Vg1 H. Nodal;
Understand the Problem
The question is asking to identify the main signaling molecules that are active in the caudal l. primitive region, presumably in a biological or developmental context.
Answer
Chordin and Nodal
Chordin and Nodal are active in the caudal l. primitive region.
Answer for screen readers
Chordin and Nodal are active in the caudal l. primitive region.
More Information
Chordin is involved in regulating primitive streak development, and Nodal is a crucial signaling molecule in this region. Together, they contribute to the complex signaling environment necessary for proper embryonic patterning.
Tips
A common mistake is assuming that all molecules mentioned play active roles in the caudal primitive region without specific evidence.
Sources
- Dissecting signaling hierarchies in the patterning of the mouse ... - ncbi.nlm.nih.gov
- 'Neighbourhood watch' model: embryonic epiblast cells assess ... - ncbi.nlm.nih.gov
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