对头足纲动物视觉感知机制的探索 - Roger Hanlon P2
本视频由科普中国和生物医学大讲堂出品
Roger Hanlon (MBL) Part 2: Exploring Mechanisms of Visual Perception
Hanlon introduces the amazing adaptive coloration of cephalopods. He uses video and still photography to showcase their ability to rapidly change color, pattern and skin texture with fine control and a diversity of appearances, to produce camouflage or to send signals. He argues that all camouflage patterns in nature can be grouped into three types. In part 2, Hanlon shows us results from his lab that make a convincing case that the rapid adaptive coloration of cephalopods is controlled by their visual system; quite impressive for a color-blind animal! Part 3 focuses on the unique skin of cephalopods including the system of pigments and reflectors that allows it to quickly change to any hue and contrast, and the papillae musculature that allows the skin to deform and create multiple 3D textures.
人类彩色视觉及其变异性的研究
Jeremy Nathans (Johns Hopkins) Part 2: Human Color Vision and its Variations
In this set of lectures, Jeremy Nathans explores the molecular mechanisms within the retina that mediate the first steps in vision. The second lecture focuses on the photoreceptors that mediate human color vision and the molecular basis for the common inherited anomalies of color vision. See more at http://www.ibioseminars.org
人类三色视觉的进化过程
Jeremy Nathans (Johns Hopkins) Part 3: The Evolution of Trichromatic Color Vision
In this set of lectures, Jeremy Nathans explores the molecular mechanisms within the retina that mediate the first steps in vision. The third lecture describes recent work on the evolution of trichromatic color vision in humans and our primate relatives. See more athttp://www.ibioseminars.orgs
【陈巍学基因】色彩视觉
嘴唇颜色红艳的姑娘是美女？为什么紫颜色和红颜色，在我们眼中很难区分？人眼是如何感知彩色颜色的，黄颜色是一种颜色吗？这个讲座将从三个部分： 1，三个视蛋白基因 2，彩色视觉的形成 3，分辨红色和绿色的能力，在自然选择中的优势 和大家谈一下彩色视觉，和相关的基因。