Optic vesicle, Biology

Assignment Help:

Optic vesicle

We have explained earlier that the presumptive material for the optic vesicles lies in qe eye field in the anterior region of the early neural plate. Experiments on amphibian embryos have displayed that if at this early open neural plate stage this material is cut out and grafted in the flank of another embryo it forms an eye cup displaying that the cells of eye field are already determined to form the eye. This determination is preceded by induction of the ectoderm to form the neural plate by the invagination chordamesoderm throughout gastrulation.

This is followed by the inductive action of the anterior part of chordamesoderm which comes to be underneath the prospective forebrain region of the neural plate, on the anterior part of neural plate. If this mesoderm is eliminated at this stage the eye field does not split and one median eye is formed. Furthermore, if this anterior chordamesoderm is grafted within the prospective hind brain region of the neural plate it induces an eye field in that region. Continued relation with mesoderm is as well essential for further development of the optic vesicle.


Related Discussions:- Optic vesicle

What is the external rigid carapace of arthropods called, What is the exter...

What is the external rigid carapace of arthropods called? Of which substance is it made? Which type of organic molecule is that substance? The external carapace of arthropods i

Transport and facilitated diffusion have in common, Q. What do active trans...

Q. What do active transport and facilitated diffusion have in common? What are the dissimilarity between them? Facilitated diffusion can be perplexed with active transport beca

Explain about gestational diabetes mellitus, Q. Explain about Gestational D...

Q. Explain about Gestational Diabetes Mellitus ? During pregnancy, a woman who does not have a history of diabetes, may develop high blood glucose or sugar. This is GDM. The di

Explain the jejuno ileal bypass and jaw wiring, Explain the Jejuno ileal By...

Explain the Jejuno ileal Bypass and Jaw Wiring? Jejuno-ileal Bypass: Absorptive surface of the small intestines can also be reduced through surgery called the jejuno-ileal by p

State about the blood ocular barriers of the eye, State about the blood ocu...

State about the blood ocular barriers of the eye? Blood Ocular Barrier: All vascular beds of the eye are highly permeable to lipoid soluble substances (oxygen, carbon dio

State the active hyperemia, Which of the following is true for active hyper...

Which of the following is true for active hyperemia, a local control mechanism within the circulatory system? A. There will be a decrease in force developed by smooth muscles s

Dna double helix , In the year of 1953, Watson and Crick worked out the...

In the year of 1953, Watson and Crick worked out the 3-D structure of DNA, beginning from X-ray diffraction photographs   taken through Wilkins and Franklin. They decreased which D

Hydropower, Energy from water or hydropower            Hydroelectrici...

Energy from water or hydropower            Hydroelectricity is the energy produce from the kinetic energy of water falling from height. Approximately 25% of world electricity

Define about the geriatric nutrition, Define about the Geriatric Nutrition?...

Define about the Geriatric Nutrition? Aging has been defined as "a series of time related process that ultimately brings life to a close." Persons of 60 years of age and older

What is chromosome mapping in phenotypic trait, What is Chromosome Mapping ...

What is Chromosome Mapping in phenotypic trait? Chromosome Mapping : By noting how often a gene segment associated with a specific phenotypic trait crossed over during meios

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd