BIOL303 Lecture Notes - Lecture 3: Optic Vesicle, Surface Ectoderm, Transmembrane Protein
3 Oct 2017
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Document Summary
Cell signaling: cell differentiation and behaviour are regulated by signals produced by one cell and received by another. Induction the process by which one cell population influences the development of neighbouring cells via interactions at close range. Inducer the tissue that produces the signal(s) that changes the cellular behaviour of the other tissue: paracrine factor the signal produced by the inducer usually a secreted protein. In the gastrulation phase, vegetal cells interact with animal cells; this interaction causes them to become mesoderm: key: b/c of their interactions at close range, the vegetal cells cause the differentiation of animal cells. Neural induction: we see the mesoderm inducing the ectoderm to become neural tissue in this scenario, a signal is useless if there is no means of reception, and an inducer must have a responder. We see an example of ectodermal competence in xenopus with the ability to respond to the optic vesicle inducer formation in the anterior portion of the ectoderm.
