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