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