1. Using your knowledge on personal care products, how does sunscreen lotion protect your skin from the damaging effect of ultraviolet rays? Explain why of x-rays and gamma rays are commonly used in radiotherapy. 2. Why do x-rays and gamma rays are commonly used in treating cancer (radiotherapy)? 3. Suppose a 490 nm wavelength of light enters your eyes, what receptors in retina of your eyes will be stimulated and what color will be perceived by your eyes?

1. Using your knowledge on personal care products, how does sunscreen lotion protect your skin from the damaging effect of ultraviolet rays? Explain why of x-rays and gamma rays are commonly used in radiotherapy. 2. Why do x-rays and gamma rays are commonly used in treating cancer (radiotherapy)? 3. Suppose a 490 nm wavelength of light enters your eyes, what receptors in retina of your eyes will be stimulated and what color will be perceived by your eyes?

Anatomy & Physiology

1st Edition

ISBN:9781938168130

Author:Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble

Publisher:Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble

Chapter16: The Neurological Exam

Section: Chapter Questions

Problem 6ILQ: Watch this video (http://openstaxcollege.org/l/2point) to see a quick demonstration of two-point...

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Watch this video (http://openstaxcollege.org/l/2point) to see a quick demonstration of two-point discrimination. Touching a specialized caliper to the surface of the skin will measure the distance between two points that are perceived as distinct stimuli versus a single stimulus. The patient keeps their eyes closed while the examiner switches between using both points of the caliper or just one. The patient then must indicate whether one or two stimuli are in contact with the skin. Why is the distance between the caliper points closer on the fingertips as opposed to the palm of the hand? And what do you think the distance would be on the arm, or the shoulder?
1. Discuss the optics of imaging the source onto the retina. 2. Discuss the absorption of light by the retinal cells. 3. Importance of electricity in the body.
3) Color vision with retinal implants sensation of white color, i.e., they do not provide color vision. Why do you think that this is so? What do you see as the biggest challenge in front of this? : Retinal implants mainly generate the
1. Match the parts of the eye with their functions: A. choroid coat 1. regulates the shape of the lens B. optic nerve 2. opening through with light enters the eye C. retina 3. carries impulses from the eye to the brain D. sclera 4. allows for sharp images by absorbing scattered light rays E. ciliary body 5. liquid which helps to maintain shape of F. iris eye G. cornea 6. transparent outer layer that refracts light 7. receives the image and changes it to an impulse H. pupil I. aqueous and vitreous humor 8. regulates the size of the pupil 9. tough, white outer coat of the eye
What could be the reason why vitamin A is essential for visual acuity? Select the correct response: • It is converted into the pigment in the iris that absorbs harmful UV radiation. • It is an integral part of the visual pigment in the retina called rhodopsin. • It neutralizes free radicals that can damage the retina of the eyes. • It serves as lubricant in the vitreous humor of the eyes.
2. Which of the following statements is a CORRECT description of the structure with its function? Group of answer choices a. Iris functions to refract (bend) light before it reaches the lens b. Sclera functions as a surface for the attachment of extraocular muscles c. Ciliary body functions to secrete vitreous humor d. Lacrimal glands function to produce aqueous humor e. Conjunctiva functions to supply the eye with blood and nutrients.
2. Which of the following statements is a CORRECT description of the structure with its function? Group of answer choices a.Iris functions to refract (bend) light before it reaches the lens b.Sclera functions as a surface for the attachment of extraocular muscles c.The ciliary body functions to secrete vitreous humor d.Lacrimal glands function to produce aqueous humor e.Conjunctiva functions to supply the eye with blood and nutrients
2. Describe the vision process. Be sure to fully address how the eye and brain process visual information.
Retinal detachment is prevelant in aged population, patients with diabetes and also can occur in response to injury to the eye. What is your opinion about retina repair and are there promising advances in the field. Make sure to include in your response the cells affected and how the sugery and the repair process happens.
Explain the process of phototransduction and signal transmission in the retina. Be sure to include the steps associated with the formation/breakdown of Rhodopsin as well as the signal transduction process that takes place in the retina beginning in the dark. Be sure to also include where in the retina these processes are taking place (i.e rods, bipolar cells or ganglion cells, outer segment, inner segment…). It is a very important question If possible, provide all the correct and detailed information, please.
10. Why is oil used under the oil immersion lens instead of water? (1 Point) O oil is thicker than glass and so it will focus the image better O Oil is less dense than water and therefore it will help focus the image better O oil and glass both refract light at the same degree and so oil will help focus the image better O oil and air both refract light at the same degree and so oil will help focus the image better O All of the above
Match the function with the correct structure. 1. Absorbs scattered light Sclera 2. Photoreceptors of the retina responsible for Vitreous humour colour vision 3. Refracts light rays into the eye Ciliary muscles 4. Supports the eyeball with the fluid they Iris contain 5. Alters the shape of the lens to promote Cones focusing Lens 6. Protects and supports the eyeball 7. Area that contains a high density of cones Choroid 8. Photoreceptors of the retina sensitive to dim Fovea centralis light 9. Focuses the light rays on the fovea centralis Rods 10. Regulates the amount of light that enters Cornea the eye