BIOL 1000 Lecture Notes - Lecture 1: Dichromacy, Trichromacy, Opsin
26 Sep 2016
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Document Summary
Visible light - the visible region of the electromagnetic spectrum that humans can detect with their eyes. (400 700nm) although you cannot see certain wavelengths, you can see their effects. (ex: uvrays, xrays etc) Photons excite electrons from ground to excited state. All have conjugated systems of delocalized electrons. Electrons capture photons/energy which can be used to do work. Light and life are linked through photosynthesis and cellular respiration. All life depends on light either directly or indirectly. Photoreceptor - light sensor (retinal & protein) pigment goes from dark (cis) to light (trans). This causes a change in memory protein which causes further change within the cell. (ex: Vision requires brain to understand signals sent from eye to brain) Organ used to sense light which is important for vision. Vision requires the brain to interpret signals fent to the brain from the eye. Compound eyes (flies have these) -> ommatidium (unit of compound eye)
