63: The eye (physiology) Quizellenjmchenry2021-10-01T23:31:32-04:00 Please sign up for the course before taking this quiz. Which of these is NOT a job that the pigmented epithelial cells do?1 Absorbs extra photons of light. 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. Form a protective barrier so that germs stay out. To view things farther away, the lens must become flatter.1 True False What holds the rhodopsin molecule in place?1 retinal molecules cytoskeleton microtubules phospholipid membrane Golgi bodies Which one of these allows us to see at night?1 cones rods Which is larger, the macula or the fovea?1 fovea macula Which of these let the rods and cones communicate with each other?1 bipolar cells ganglion cells amacrine cells horizontal cells You have more rods than cones.1 True False Which cell part makes a microtubule highway through a narrow passage in the rod and cone cells?1 centrioles mitochondria Golgi bodies ribosomes nucleus What happens when a photon of light hits the retinal molecule?1 It loses an electron. It falls out of the rhodopsin molecule. It changes shape and becomes straight. It regenerates. It starts an action potential. Which of these parts bends light?1 optic nerve retina ciliary body cornea iris Pigmented epithelial cells regenerate when damaged, just like skin cells.1 True False Which of these leads right into the optic nerve?1 ganglion cell amacrine cell horizontal cell bipolar cell Which of these is a color that cones don’t respond to?1 yellow blue red green You blind spot is right over your fovea.1 True False The retina sees images upside down.1 True False Which is smaller, rhodopsin or retinal?1 rhodopsin retinal Which amino acid to we find functioning as a neurotransmitter at the ends of rods and cones?1 glycine glutamate glutathione lysine Which of these parts holds the lens in place?1 cornea aqueous humor zonules of Zinn iris canals of Schlemm 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 When it is dark, the rods are switched on and are releasing neurotransmitters.1 True False 77: Joints 78: Muscles (as organs) Back to: 63: The eye (physiology)