63: The eye (physiology) Quizellenj2022-12-02T13:36:08-05:00 Please sign up for the course before taking this quiz. 1. Where will you find the highest number of cone cells?1 They are evenly spaced all over the retina. In the macula At the outer edges of the retina 2. Pigmented epithelial cells regenerate when damaged, just like skin cells.1 True False 3. Which of these let the rods and cones communicate with each other?1 horizontal cells amacrine cells ganglion cells bipolar cells 4. Which of these parts holds the lens in place?1 iris canals of Schlemm cornea zonules of Zinn aqueous humor 5. Which one of these allows us to see at night?1 cones rods 6. To view things farther away, the lens must become flatter.1 True False 7. You have more rods than cones.1 True False 8. Which amino acid to we find functioning as a neurotransmitter at the ends of rods and cones?1 glutamate glycine glutathione lysine 9. The retina sees images upside down.1 True False 10. Which is larger, the macula or the fovea?1 macula fovea 11. Which of these is NOT a job that the pigmented epithelial cells do?1 Prune the tips off the rod and cone cells and recycle them. Provide a connection between rods and cones so they can cooperate. Nourish the rod and cone cells. Absorbs extra photons of light. Form a protective barrier so that germs stay out. 12. Which of these parts bends light?1 cornea iris retina ciliary body optic nerve 13. Which cell part makes a microtubule highway through a narrow passage in the rod and cone cells?1 Golgi bodies ribosomes mitochondria nucleus centrioles 14. Which of these is a color that cones don’t respond to?1 green yellow red blue 15. What holds the rhodopsin molecule in place?1 retinal molecules phospholipid membrane cytoskeleton microtubules Golgi bodies 16. Which of these leads right into the optic nerve?1 bipolar cell horizontal cell amacrine cell ganglion cell 17. Which is smaller, rhodopsin or retinal?1 retinal rhodopsin 18. Your blind spot is right over your fovea.1 True False 19. When it is dark, the rods are switched on and are releasing neurotransmitters.1 True False 20. What happens when a photon of light hits the retinal molecule?1 It loses an electron. It changes shape and becomes straight. It starts an action potential. It falls out of the rhodopsin molecule. It regenerates. 77: Joints 78: Muscles (as organs) Back to: 63: The eye (physiology)
