In mamalian development the AVE is equivalent to the chick H

In mamalian development the AVE is equivalent to the chick Hensons Amphibian organizer Hypoblast neural ectoderm Which of the following are secreted from the visceral endoderm of the AVE and play a critical role in anterior brain structures Nodal, Lefty 1 and Cerebrus Lefty 1 and Cerebrus Cerebrus Nodal The posterior axis is dominated by the The secretion of which sequence of factors as we move to the more posterior aspects of the axis the anterior is devoid of BMP and levels of Nodal, FGF\'s and Wnts are where as the posterior region has Wnts, and FGF\'s and Retinoic acid o The anterior is devoid of FGF\'s and levels of BMP Nodal and Wnts are inhibited where as he posterior region has Nodal, and Retinoic acid The is of wnts and levels of BMP. FGF\'s and Nodal are inhibited where as the posterior region has Nodal BMP\'s wnts, and FGF\'s and Retinoic acid The anterior is devoid of nodal and levels of BMP. FGF\'s and Wnts are d where as the posterior region has Nodal and BMP\'s. Wnts, and FGF\'s and Retinoic acid If development of a hypothetical mouse takes 21 days, from conception to birth Day 7 is analogues to the year of life first trimester second trimester third trimester

Solution

Answer 1. Henson\'s Node

Answer 2. Lefty 1 and Cerebrus

Answer 4: First trimester.