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