XYZ For the Following Questions, Assume a Hypothetical Postsynaptic Neuron Has

question 230

Multiple Choice

XYZ
For the following questions, assume a hypothetical postsynaptic neuron has three presynaptic inputs: X, Y, and Z. Also assume that presynaptic neurons Y and Z are excitatory.
-Refer to the text.What permeability changes would be expected to occur at the postsynaptic neuron when presynaptic neuron X is stimulated (Remember that the postsynaptic neuron becomes hyperpolarized by presynaptic neuron X.)

• A)increased PNa⁺ and PK⁺
• B)increased PK⁺ or PCl^-
• C)increased PA^-
• D)increased PCa²⁺

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Definitions:

Cones

The light-sensitive receptor cells in the retina that enable humans to see color and fine detail in adequate light but do not function in very dim light.

Night Vision

The ability to see in low-light conditions, which varies significantly among different species and is enhanced by technological devices for humans.

Optic Nerve

The nerve that carries visual information from each retina to both sides of the brain.

Ganglion Cells

Specialized neurons located in the retina that play a critical role in processing visual information.