Bio 11 Lec Feb 29 - Bio 11 Lec Specific Sensory Systems...

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Bio 11 Lec Feb 29, 08 Specific Sensory Systems Synesthesia- condition in which two or modre bodily senses are coupled. Skin has many different sensory neurons/ receptors o Slide 9 o Send information to the somatosensory cortex, right next to primary motor cortex. Different regions process information from different areas of the body Information from the left side of the body is sent to the right side of the brain Eyes are sensitive to certain wavelengths, stimuli for the visual system o Incorporate in wavelengths a pigment o Capacity for image formation in the brain Eyes o Insects Compound eye, ommatidium- independent photosensitive unit Bad resolution but wide angle of vision o Mollusks Eye very similar to human eye Ocotpus eye (camera eye) o Humans Sclera- dense outer structure Retina- light focused on retina and signal is sent to the optic nerve Iris opens and closes pupil Lens bends light to direct it toward retina o Muscles contract, changing the shape of the lens allowing to focus on far and close objects Far away- lens flattens Close- lens bulges
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