63: The eye (physiology) Quizellenjmchenry2022-12-02T13:36:08-05:00 Please sign up for the course before taking this quiz. Which of these is NOT a job that the pigmented epithelial cells do?1 Prune the tips off the rod and cone cells and recycle them. Form a protective barrier so that germs stay out. Absorbs extra photons of light. Provide a connection between rods and cones so they can cooperate. Nourish the rod and cone cells. Which of these leads right into the optic nerve?1 bipolar cell ganglion cell amacrine cell horizontal cell Which amino acid to we find functioning as a neurotransmitter at the ends of rods and cones?1 lysine glutamate glycine glutathione You have more rods than cones.1 True False Your blind spot is right over your fovea.1 True False Which of these parts holds the lens in place?1 canals of Schlemm iris cornea zonules of Zinn aqueous humor Pigmented epithelial cells regenerate when damaged, just like skin cells.1 True False Which of these is a color that cones don’t respond to?1 green yellow blue red What holds the rhodopsin molecule in place?1 phospholipid membrane retinal molecules cytoskeleton microtubules Golgi bodies 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. Which is smaller, rhodopsin or retinal?1 rhodopsin retinal Where will you find the highest number of cone cells?1 They are evenly spaced all over the retina. At the outer edges of the retina In the macula The retina sees images upside down.1 True False Which one of these allows us to see at night?1 cones rods When it is dark, the rods are switched on and are releasing neurotransmitters.1 True False Which of these let the rods and cones communicate with each other?1 ganglion cells bipolar cells amacrine cells horizontal cells Which cell part makes a microtubule highway through a narrow passage in the rod and cone cells?1 ribosomes nucleus centrioles Golgi bodies mitochondria To view things farther away, the lens must become flatter.1 True False Which is larger, the macula or the fovea?1 macula fovea Which of these parts bends light?1 ciliary body optic nerve cornea iris retina 77: Joints 78: Muscles (as organs) Back to: 63: The eye (physiology)
