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