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- Please ASAP. Thanku. 7. Which of the following statements about the lateral geniculate nucleus of the thalamus (LGN) is FALSE? A. The LGN is organized into six main layers, with layers that contain konicellular cells in between B. The parvocellular pathway is important for detecting the direction of movement of visual objects C. There are two magnocellular layers. D. There are four layers that contain small parvocellular cells. E. The LGN relays information from the parvocellular and magnocellular pathwayDefine macula densaMatch the term to its description by writing the appropriate letter in the space. ___1. Lateral inhibition ___2. Ganglion cells ___3. Lateral geniculate nucleus ___4. Superior colliculus ___5. End-stopped cells ___6. Bipolar cells ___7. Complex cells ___8. Selective adaptation ___9. Selective rearing ___10. Accommodation ___11. Horizontal cells ___12. Simple cells A. Area responsible for controlling eye movements B. Respond best to moving bars of a specific orientation C. The axons of these form the optic nerve D. Results in decreased sensitivity to the exposed stimulus E. Where visual information travels before reaching V1 F. Signals transmitted across a nerve circuit G. Respond best to bars of a particular orientation H. When the lens changes shape to focus I. Carry inhibitory signals between bipolar cells J. Long-term exposure to an environment resulting in neural plasticity K. Respond best to corners or lines of a particular length L. Receive signals from rods and cones
- 6clera Matching Match each lettered term with the most closely related description. a. ganglion cells 17 Visual pigment 17 b. cones 18 Eyelids 18 C. vascular layer 19 Transparent proteins in the cells of a lens 20 White of the eye 19 d. rods scleva Pupil 20 e. optic disc 21 Opening surrounded by the iris 22 Inner layer 21 f. posterior chamber 22 g. crystallins 23 Site of vitreous body 23 h. sclera 24 Photoreceptors that enable vision in dim light 24 Yods i. retina 25 Extends between the iris and the ciliary body and lens 25 j. occipital lobe k. palpebrae 1. rhodopsin 26 Sharpest vision 26 27 Visual cortex 27 28 28 Photoreceptors that provide the perception of color Cones 29 m. fovea centralis 29 Their axons form the optic nerves 30 n. posterior cavity 30 Iris, ciliary body, and choroid Optic disk 31 o. pupil 31 Region of retina called the "blind spot" Section integration A bright flash of light from nearby exploding fireworks blinds Rachel's eyes. The result is a "ghost image ins on…Label the following structures. А В C DWrite the letter that contains the macula densa cells.
- Define maculaDescribe the function of the cells of the macula densa.A 17-year-old boy suffered an injury to his left eye when, during a car crash, a sharp sliver of glass penetrated his eye, damaging his lens and uveal tract. The glass was removed and the injury repaired with complete recovery. However, 3 weeks later he noticed some redness in the left eye and photophobia, followed by pain and severe visual impairment. The left eye was removed and histologic examination showed an extensively infiltrated uveal tract with abundant lymphocytes and mononuclear cells. Two weeks later the other eye began to show the same symptoms. Since the lens was damaged the most likely scenario is that: A. this is an example of immediate hypersensitivity. B. sequestered antigen was released and initiated an immune response. C. some of the glass must have penetrated the right eye as well. D. the bacteria entered the damaged eye and is causing an infection in both eyes.
