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