CBNS 121 | EVERY QUESTION SOLVED | EVERY
SCORE SECURED!
Noggin - Answer - rescue ventralized embryos
- induce neural tissue in animal caps
Chordin - Answer - expressed in the organizer
- has neural inducing activity
What happens when TGF(beta) receptors are blocked? - Answer Mimics the effects of
Chordin/ Noggin
Follistatin - Answer Bind to TGF(beta) secreted signals and inhibit them
Which proteins inhibit TGF(beta) signals? - Answer - Noggin
- Chordin
- Follistatin
BMP - Answer Bone Morphogenetic Protein
What do bmps do? - Answer Promote new bone growth, which is essential for
developing embryos
True/False
TGF(beta) receptors are bmps. - Answer True
What does the loss of Noggin and Chordin do in mice? - Answer Causes severe defects
in the head and limits brain development
1
APPHIA - Crafted with Care and Precision for Academic Excellence.
, What is required for neural induction? - Answer - Activation of FGF signaling
- Blocking of BMP signaling
When is neural tissue induced? - Answer During Gastrulation
Where is the nervous system derived from? - Answer Ectoderm
Where do the signals for neural induction come from? - Answer Mesoderm
Spemann-Mangold Organizer - Answer A tissue that secretes a mixture of growth factor
antagonists, which are able to induce embryonic cell differentiation
Wnt - Answer - High in posterior embryo
- Wnt inhibitors in anterior mesoderm
Wnt inhibitors - Answer - Dkk
- Cerberus
What happens when Dkk1 is removed? - Answer Hyperactive Wnt signaling
- lack a forebrain and anterior head structures
Retinoic Acid (RA) - Answer - Derivative of Vitamin A (retinol)
- Known to be powerful teratogen
- Levels are higher in posterior than anterior
- regulates HOX gene expression in vertebrates
2
APPHIA - Crafted with Care and Precision for Academic Excellence.
SCORE SECURED!
Noggin - Answer - rescue ventralized embryos
- induce neural tissue in animal caps
Chordin - Answer - expressed in the organizer
- has neural inducing activity
What happens when TGF(beta) receptors are blocked? - Answer Mimics the effects of
Chordin/ Noggin
Follistatin - Answer Bind to TGF(beta) secreted signals and inhibit them
Which proteins inhibit TGF(beta) signals? - Answer - Noggin
- Chordin
- Follistatin
BMP - Answer Bone Morphogenetic Protein
What do bmps do? - Answer Promote new bone growth, which is essential for
developing embryos
True/False
TGF(beta) receptors are bmps. - Answer True
What does the loss of Noggin and Chordin do in mice? - Answer Causes severe defects
in the head and limits brain development
1
APPHIA - Crafted with Care and Precision for Academic Excellence.
, What is required for neural induction? - Answer - Activation of FGF signaling
- Blocking of BMP signaling
When is neural tissue induced? - Answer During Gastrulation
Where is the nervous system derived from? - Answer Ectoderm
Where do the signals for neural induction come from? - Answer Mesoderm
Spemann-Mangold Organizer - Answer A tissue that secretes a mixture of growth factor
antagonists, which are able to induce embryonic cell differentiation
Wnt - Answer - High in posterior embryo
- Wnt inhibitors in anterior mesoderm
Wnt inhibitors - Answer - Dkk
- Cerberus
What happens when Dkk1 is removed? - Answer Hyperactive Wnt signaling
- lack a forebrain and anterior head structures
Retinoic Acid (RA) - Answer - Derivative of Vitamin A (retinol)
- Known to be powerful teratogen
- Levels are higher in posterior than anterior
- regulates HOX gene expression in vertebrates
2
APPHIA - Crafted with Care and Precision for Academic Excellence.
