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