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