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Rod cell: Quiz


Question 1: A rod cell is sensitive enough to respond to a single ________ of light[citation needed], and is about 100 times more sensitive to a single photon than cones.
ElectronPhotonStandard ModelAtom

Question 2:

Question 3: Because they have only one type of light-sensitive pigment, rather than the three types that human cone cells have, rods have little, if any, role in ________ vision.
ColorPurplePrimary colorGreen

Question 4: [3] The inner segment contains ________ and the cell's nucleus, while the rod outer segment (abbreviated to ROS), which is pointed toward the back of the eye, contains the light-absorbing materials.
OrganelleCell nucleusCell (biology)Mitochondrion

Question 5: Though cone cells primarily use the neurotransmitter substance ________, rod cells use a variety.
DextromethorphanKynurenic acidAcetylcholineKetamine

Question 6: The positive charges of the ions that enter the cell down its electrochemical gradient change the cell's membrane potential, cause depolarization, and lead to the release of the neurotransmitter ________.
GlutamineDizocilpineGlutamic acidNitrous oxide

Question 7: Experiments by ________ and others showed that rods are most sensitive to wavelengths of light around 498 nm (green-blue), and are completely insensitive to wavelengths longer than about 640 nm (red).
Alfred HersheyGeorge WaldHaldan Keffer HartlineGeorge Emil Palade

Question 8: When they are not being stimulated, such as in the dark, rod cells and ________ depolarize and release a neurotransmitter spontaneously.
Photoreceptor cellRetinaCone cellAmacrine cell

Question 9: Activation of a single unit of ________, the photosensitive pigment in rods, can lead to a large reaction in the cell because the signal is amplified.

Question 10: However, this convergence comes at a cost to visual acuity (or image resolution) because the pooled information from multiple cells is less distinct than it would be if the ________ received information from each rod cell individually.
Visual systemVisual perceptionOptic tractRetina


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