Q2/ Fill five of the following by the suitable sentences in the brackets below:- (Ciliary muscle, too long, ligaments, cornea, the cornea, cornea, transparent tissue, fibrous jelly, 1.437, soft, 1.336, front of the retina) 1. The eye part which receives light firstly is called 2. The cornea is a ....... visible light. 3. Crystalline lens contains a ....... hard at the center and progressively at outer portion. 4. The crystalline lens is held in place by ...... ..... which attach it to the 5. The crystalline lens, while not homogenous, has an average index of in comparison with the 6. In the myopic eye, the eye ball is radius of curvature of the cornea. 7. In the myopic eye, the rays from an object at infinity are focused in

Q2/ Fill five of the following by the suitable sentences in the brackets below:- (Ciliary muscle, too long, ligaments, cornea, the cornea, cornea, transparent tissue, fibrous jelly, 1.437, soft, 1.336, front of the retina) 1. The eye part which receives light firstly is called 2. The cornea is a ....... visible light. 3. Crystalline lens contains a ....... hard at the center and progressively at outer portion. 4. The crystalline lens is held in place by ...... ..... which attach it to the 5. The crystalline lens, while not homogenous, has an average index of in comparison with the 6. In the myopic eye, the eye ball is radius of curvature of the cornea. 7. In the myopic eye, the rays from an object at infinity are focused in

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter36: Sensory Systems

Section: Chapter Questions

Problem 20RQ: Why do people over 55 often need reading glasses? Their cornea no longer focuses correctly Their...

See similar textbooks

Similar questions

3 questions 1.) The middle ear chamber is an air-filled “hole in the head”, which is adapted to allow free movement of the tympanum as it vibrates. Unless the pressure in the chamber is equal to atmospheric pressure outside, the tympanum will be stretched outward or inward, impeding itsvibration and causing discomfort or pain. When moving up in the elevator of a tall building, the surrounding atmospheric pressure is: a) increasing causing air to enter the middle ear chamber through the Eustachian tube. B.) increasing causing air to enter the middle ear chamber through the auditory canal C.)decreasing causing air to leave the middle chamber through the Eustachian tube D.) decreasing causing air to leave the middle ear chamber through the auditory canal Ques 2 and 3 are in the picture
1- Examine the external characteristics of the eye and answer the questions Cornea Optic nerve a. What is the purpose of the fatty tissue surrounding the eye? b. Notice the muscles surrounding the eye. What is the function of these muscles and how do they affect vision? Fat Muscle
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
2. Describe the vision process. Be sure to fully address how the eye and brain process visual information.
8. A female child, age 6, is brought to the health clinic for a routine checkup. To assess the child's vision, the nurse should ask: A. "Do you have any problems seeing different colors?" B. "Do you have trouble seeing at night?" C. "Do you have problems with glare?" D. "How are you doing in school?"
3. O bluedoor, LLC 2. Using the provided word list below, label the numbered structures: Rod Horizontal cell Cone Amacrine cell Choroid Bipolar cell Rod and Cone layer Bipolar layer Ganglion cell axons Pathway of light to optic nerve 1. . 2. Ganglion cell layer -4 4. 1- - 5 5. 6. 7. 2 - 7. 8. 8. 3 Sclera Laboratory 18 Special Senses: Vision 369
6-10. What is Defects of Vision? In your own words
Why do people over 55 often need reading glasses? Their cornea no longer focuses correctly Their lens no longer focuses correctly Their eyeball has elongated with age, causing images to focus in front of their retina Their retina has thinned with age, making vision more difficult.
Visual accommodation involves adjustment to the shape or position of the ___ . a. conjunctiva b. retina c. orbit d. lens
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.
3 questions 1.) Which of the following is NOT a property of the rod cells found in the retina? A.) A rod cell can detect a single photon of light. B.) They are concentrated mainly in the fovea centralis. C.) The rods detect motion and are responsible for peripheral vision . D.) There are about 125 million rods in the retina. 2.) Which of the following statements CORRECTLY describes the function of a component of a reflex arc? a.Sensory neurons gather information from effectors. b.Sensory receptors receive stimuli from interneurons. Question 3 is in the pic c.Motor neurons conduct impulses from interneurons to effectors. d.Effectors act as integration centres.
14. Note that the cornea does not have any blood vessels. Given the function of the cornea, why do you think it is important that the cornea is clear and free of blood vessels?