The figure illustrates the receptive field of an OFF-center ganglion cell under different light conditions. Rank the neuronal activity (highest to lowest) from A to D. A Center Surround B C OOOO D
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- What is the shape of a receptive field of a ganglion cell?A. Either a bar or an edge, in a fixed positionB. Either a bar or an edge, anywhere within a large area of the retinaC. Either a bar or an edge, with a strong inhibitory field at one endD. A circle, with a surround that responds in the opposite wayFor a ganglion cell that has a red ON center and Green OFF surround, explain how frequent these ganglion cells would fire an action potential in the following situations: a. When there is no color hitting the ganglionAn individual diagnosed with CMT has difficulty holding a cup because: a. The myelin in the motor neurons is damaged thereby preventing an impulse frommoving along the axonb. The myelin in the sensory neurons is damaged thereby preventing an impulse frommoving along the axonc. The dendrites in the motor neurons are damaged thereby preventing an impulse frommoving along the axond. The dendrites in the sensory neurons are damaged thereby preventing an impulse frommoving along the axon
- In the light, Question options: A the photoreceptor does nothing, therefore the bipolar cells are inhibited. B the photoreceptor hyperpolarizes and stops releasing glutamate onto bipolar cells, which in turn stimulate the ganglion cells. C the photoreceptor depolarizes and releases glutamate onto bipolar cells, stimulating them. D the photoreceptor depolarizes and releases glutamate onto bipolar cells, inhibiting them.In the dark, Question options: A the photoreceptor does nothing, therefore the bipolar cells are inhibited. B the photoreceptor depolarizes and releases glutamate onto bipolar cells, stimulating them. C the photoreceptor hyperpolarizes and stops releasing glutamate onto bipolar cells, which in turn stimulate the ganglion cells. D the photoreceptor depolarizes and releases glutamate onto bipolar cells, inhibiting them.View the University of Michigan WebScope (http://openstaxcollege.org/l/nervefiber) to see an electron micrograph of a cross-section of a myelinated nerve fiber. The axon contains microtubules and neurofilaments that are bounded by a plasma membrane known as the axolemma. Outside the plasma membrane of the axon is the myelin sheath, which is composed of the tightly wrapped plasma membrane of a Schwann cell. What aspects of the cells in this image react with the stain to make them a deep, dark, black color, such as the multiple layers that are the myelin sheath?
- Two branching dendritic arbors are stimulated at the same exact time at locations A & B which are both 10 um away from the axon hillock. Upon stimulation, location A depolarizes 20 mV and location B depolarizes 15 mV. The time constant is the same in both dendrites. The length constant in both dendrites is 10 um. The RMP is -70 mV and the threshold to fire an action potential is -55 mV. Based on the above information, does the neuron fire an action potential? Explain your answer.Identify and describe the following on the diagrams below: 1. Dendrites 2. Axon 3. Cell body 4. Myelinated nerve fiberView an electron micrograph of a cross-section of a myelinated nerve fiber image below. The axon contains microtubules and neurofilaments, bounded by a plasma membrane known as the axolemma. Outside the plasma membrane of the axon is the myelin sheath, which is composed of the tightly wrapped plasma membrane of a Schwann cell. What aspects of the cells in this image react with the stain that makes them the deep, dark, black color, such as the multiple layers that are the myelin sheath?
- I am confused about the process of rod cells in the dark. In the dark, rod cells are unstimulated and therefore the sodium is able to enter and depolarize the cell, stimulating the release of glutamate to the bipolar cell. However, this increase in glutamate in the bipolar cell inhibits the release of action potential from the bipolar cell to the ganglion cell. This doesn't make sense to me because shouldn't there be an increase in action potential since the rod cells are supposed to function in the dark?Choose the item in column 2 that best matches each item in column 1 nodes of Ranvier resting membrane potential axon dendrite myelin sheath synapse nerve A. neuronal cell extension that propagates action potentials away from the cell body B. discontinuous insulation of an axon C. bundle of axons…Using cable theory to describe axon conduction would tell us a. the larger the diameter of the axon the faster the propagation of the action potential b. the larger the diameter of the axon the slower the propagation of the action potential c. the smaller the diameter of the axon the faster the propagation of the action potential d. that having big axons is of no benefit and only takes up a lot of space e. the nervous system mainly has small axons because they are much faster than large ones
