Special Senses

What is the distribution of rods and cones on the retina? What results did we observe from the visual field experiment that confirms this? In your response describe the data collected and correlate the data with the known distribution of rods and cones. (10 points) Rods are very sensitive and respond to very dim light making them best suited for night and peripheral vision. Cones need bright light for activation because they have a low sensitivity but react more rapidly. Cones furnish vivid colored views while rods perceive more gray tones. (Marine & Hone, 2013, p. 59) Q. 2.

Describe the path off sound wave from the time it reaches the piano to the deflection of the dictatorial membrane. In a separate paragraph briefly explain why hearing is mechanical in nature. (5 points) 1. Sound waves vibrate the tympani membrane. 2. Auditory icicles vibrate. Pressure is amplified. 3. Pressure waves created by the stapes pushing on the oval window move through fluid in the scale vestibule. AAA. Sounds with frequencies blow hearing travel through the helicopters and do not excite hair cells. B. Sounds in the hearing range go wrought the cochlear duct, vibrating the basilar membrane and deflecting hairs on inner hair cells.

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The hearing process is completely mechanical. Your sense of smell, taste and vision all involve chemical reactions, but your hearing system is based solely on physical movement. (Harris, n. D. , Para. 1) Q. 3. Describe the structures normally found on foundations exam of the eye. What Is the benefit of being able to visualize the retinal blood vessels and optic nerve? (5 points) When a fundamental exam of the eye Is performed, one looks at structures lying In he Innermost aspect of the globe, collectively known as the greyhounds: retina, retinal blood vessels, optic nerve head (disk), and to a limited degree, substance choroids. Schneider, 1990) The benefit of being able to visualize the retinal blood vessels and optic nerve are to determine whether each are healthy and In proper working order or not. It could also help determine diseases of the eye. Q. 4. What Is accommodation? Describe the role of the culinary body, the culinary muscles and the lens In accommodation. (5 points) Accommodation Is the process that Increases the refractory power of the lens. The culinary muscles contract, pulling the culinary body interiorly toward the pupil and Inward, releasing tension In the culinary zone.

No longer stretched, the elastic lens recoils and bulges, providing the shorter focal length needed to focus the Image of a close object on the retina. (Marble & Hone, 2013, p. 556) Special Senses By Sara-Gambling found on foundations exam of the eye. What is the benefit of being able to visualize When a foundations exam of the eye is performed, one looks at structures lying in he innermost aspect of the globe, collectively known as the greyhounds: retina, blood vessels and optic nerve are to determine whether each are healthy and in What is accommodation?

Describe the role of the culinary body, the culinary muscles and the lens in accommodation. (5 points) Accommodation is the process that increases the refractory power of the lens. Inward, releasing tension in the culinary zone. No longer stretched, the elastic lens recoils and bulges, providing the shorter focal length needed to focus the image of a close object on the retina.