The following graph shows that light is projected to the surround of an off-center ganglion cell's receptive field. Propose a possible explanation on why the light caused depolarization of the off-center ganglion cell? Please explain the changes in membrane potential and in neurotransmitter release for each neuron involved. (A) Surround Center Surround Surround cone Center cone Surround cone Horizontal cell On-center bipolar cell On-center ganglion cell
Added by Brenda F.
Close
Step 1
This is because the off-center ganglion cell is inhibited by light falling on its surround, leading to hyperpolarization, which in turn disinhibits the ganglion cell and causes depolarization. Step 2: The changes in membrane potential for the off-center ganglion Show more…
Show all steps
Your feedback will help us improve your experience
Shaiju T and 98 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Imagine a retinal ganglion cell (pictured below) which is excited by a photoreceptor in the center of its receptive field and inhibited by two adjacent photoreceptors. The excitation from the center photoreceptor is three times as strong as the inhibition from the adjacent photoreceptors. The plot below has been arranged so that when the center is at one position, the adjacent (inhibitory) photoreceptors are at the adjacent locations. Calculate the response for the same ganglion cell shifted to each of positions 1-10 and plot them on the graph provided below.
Sri K.
Consider a cluster of nine retinal ganglion cells whose receptive fields are arranged as shown by the circles below. Assume further that the ganglion cells' receptive fields are arranged such that stimulus of the center of the field (shaded) is excitatory and stimulus of the periphery (unshaded) is inhibitory (i.e. they are on-centre). a) Sketch a shape (on top of the picture above) which, if presented to the ganglion cells' receptive field as a uniformly lit area (no change in illumination over the surface of the shape), will cause a change in the firing rate of cells c, e, f, g, and h, and will cause no response at all in the other cells. Explain your choice of shape. [2 Marks]
Of the neurons in the retina, the axons of which of these form the optic nerve? (a) bipolar cells, (b) ganglion cells, (c) cone cells, (d) horizontal cells.
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD