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