Ch 50 - Sensory and Motor Mechanisms (1 slide per page)

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Unformatted text preview: &rendertype=figure&id=A1101 http://classes.midlandstech.edu/carterp/Courses/bio211/chap25/Slide25.GIF 23 Types of Sensory Receptors Mechano Stretch receptors Muscle spindles - stretch receptors in muscle which detect changes in the length of this muscle Induce action potential by opening stretch-gated ion channels 24 Types of Sensory Receptors Mechano Motion sensitive hairs Detect: • objects • predator or prey movements • water movement and currents • low frequency vibrations (sound) Naked mole rat 25 Types of Sensory Receptors Mechano Motion sensitive hairs Detect objects or predator or prey movements Sensory neuron dendrites wind around base of hair Figure 50.5 (Campbell 9th ed) Naked mole rat 26 Types of Sensory Receptors Mechano Motion sensitive hairs Detect objects or predator or prey movements Spiders have motion sensitive hairs on their legs metatarsal lyriform organ Spider tarsus Pretarsal sensillum Metatarsus Metatarsal bridge hairs Metatarsal bridge hairs interneuron sensitivity in the ganglion of the 1st right leg http://www.springerlink.com/index/N7462V042MT7L52H.pdf 27 Types of Sensory Receptors Mechano Motion sensitive hairs Detect objects or water currents Manatee sensory hairs on face http://www.scholarpedia.org/article/Image:Tactile_hair_in_manatees_manatee_fig1.jpg Hairs on body may act similarly to lateral line systems in fish http://www.savethemanatee.org/usgs_calf_hair.jpg 28 Types of Sensory Receptors Mechano Motion sensitive hairs Detect water currents, predator prey movements and low frequency vibrations (sound) Hair pit organs of Australian crayfish Lateral Line system Occurs in most aquatic vertebrates (fish, sharks, amphibians) Amphiuma means Canal, hair cells, sensory hairs, cupula, nerve fibers http://jeb.biologists.org/content/88/1/351.full.pdff Figure 50.14 (Campbell 9th ed.) 30 Types of Sensory Receptors Mechano Motion sensitive hairs Detect prey Sensitive trigger hairs of the trap-jaw ant Odontomachus coquereli http://www.alexanderwild.com/Ants/Making-a-Living/The-Trap-Jaw-Ants/coquereli20/624869092_KxEeN-M.jpg 31 Types of Sensory Receptors Mechano Hearing Receptors sensitive to vibration (hairs and/or membranes) 32 Types of Sensory Receptors Mechano Hearing Many insects have hairs of varying length / thickness that detect different frequencies Red imp...
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This note was uploaded on 02/12/2014 for the course BIOLOGY 2011 taught by Professor Woo during the Fall '10 term at University of Central Florida.

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