MCELLBI C61 Lecture Notes - Lecture 15: Karl Von Frisch, Electromagnetic Spectrum, Color Vision
17 May 2020
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Document Summary
Sensation: a property of all living organisms (e. g. bacteria, animals, plants, fungi) Microorganisms can detect and respond to physical stimuli in their environment: coli: uses chemotaxis to respond to the presence of chemicals in the environment + swims in a random walk of runs and tumbles . Running: all the agella are operating coherently in a bundle to propel a bacteria through the medium. Tumbling: the direction of rotation of the agella suddenly reverses, and the bundle disperses, sending the bacteria in a random direction. Tumble less in the vicinity of desired chemical and congregate. Phototaxis, phototropism: examples of behavioral responses to light among bacteria protists, fungi, plants + animals. Respond to environmental signals: light, chemicals, presence of other plants. Complex communication networks w other plants via molecular signaling (airborne molecules, interconnected root systems, underground fungal networks) Sensation: the detection + behavioral response to a stimulus in the physical environment.
