LS 2 Review Sensory System

LS 2 Review Sensory System - LS 2 Review: Sensory System...

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LS 2 Review: Sensory System (Ch.46) I. Sensory Cells: (Receptor Cells) Transduce physical or chemical stimuli into signals that are transmittable and interpretable. Look like regular cells but behave like neurons a. Chemoreceptors: apply molecule to have response ex: tongue/nose (Metabotropic) b. Thermoreceptors: temperature response. (Ionotropic) c. Electroreceptors: respond to electrical fields. (not in humans) (Ionotropic) d. Photoreceptors: stimulated by light (Metabotropic) e. Mechanoreceptors: stimulated by movement, pressure. (Ionotropic) Ex: Synethesia: Union of Senses Association of stimulus with a secondary sensor. Olfactory: The receptor cells of the human olfactory system are embedded in epithelial tissue lining the nasal cavity and send their axons to the olfactory bulb of the brain.
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Gustation : I n vertebrates, taste buds in the mouth cavity are responsible for gustation. The five basic tastes are sweet, salty, sour, bitter, and umami. Human tongue has approximately 10,000 taste buds (chemoreceptors), most of which our found on the Papillae
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Mechanoreceptors: i. Skin: Found deeper in the skin. 1. Pacinian Corpuscles: provide information about vibrating stimuli of higher frequencies. 2. Dendrites of Sensory neurons- are also wrapped around hair follicles, which detect displacement of the hairs. 3. A small path of skin has a variety of sensory cells, making the skina multi-modal receptor that can sense temperature, pressure, texture, pain, touch, itch. ii. Stretch Recpetors, in Muscles, Tendons, Ligaments
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LS 2 Review Sensory System - LS 2 Review: Sensory System...

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