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