BIOL 350 Lecture Notes - Lecture 25: Bombyx Mori, Cytoskeleton, Shoaling And Schooling
Document Summary
Slide 41 channels of information transfer: electromagnetic and thermal energy, mechanical, chemical. Venus flytrap uses it to detect/catch prey: when it detects an insect inside of it initiates mechanical signals that cause it to close. Impatiens (the flower) : to release seeds: the motion/heavy wind/ a simple touch cause the fruit to explode. At short distances, movement of molecules through a substrate. Snakes detect substrate vibrations better than sound (use inner ear) Spiders detect prey in their webs, mates, and competitors: slit sensilla, mechanoreceptors, in cuticle. Sense physical deformation: pressure, touch, stretch, motion, sound, vibration, ion channels linked to hairs or, internal structure cells like cytoskeleton, bending/stretching alters permeability of ion channel electrical signal. Mammals: dendrites that wind around base of hairs detect gentle touch, touch receptors deep in skin detect deeper pressure. The motion in the water will be sensed: used to detect predators, prey, inanimate objects, used in schooling: blind fish schools.
