Homeostatic Regulation of Photoreceptor Cell Integrity: Significance of the Potent Mediator Neuroprotectin D1 Biosynthesized from Docosahexaenoic Acid (The Proctor Lecture)

submitted by: arvojenny
Vision is sustained by a unique and beautiful relationship—that between photoreceptor cells and retinal pigment epithelial (RPE) cells. From the harmony of this cellular relationship emerges the life-long survival of the photoreceptor cell, despite the fact that the part of the eye where these cells interact is continuously exposed to potentially damaging factors. This relationship is one of the best examples of homeostasis in action as conceptualized for other cells and organs in 1932 by...
Authors: Nicolas Bazan

Stem Cells: Biology and Promise for Regenerative Medicine by Elaine Fuchs, Jan. 2007 - Part 1: Introduction to Stem Cells and Ethical Issues (35:11)

submitted by: video_collector
During embryogenesis, a single fertilized oocyte gives rise to a multicellular organism whose cells and tissues have adopted differentiated characteristics or fates to perform the specified functions of each organ of the body. As embryos develop, cells that have acquired their particular fate proliferate, enabling tissues and organs to grow. Even after an animal is fully grown, however, many tissues and organs maintain a process known as homeostasis, where as cells die, either by natural...