(b) Describe or draw the response you would observed in cell C if an action potential occurred in celB, closely followed by an action potential in cell A.= glutamate= AMPA receptor= GABA, receptor= GABA

Presynaptic neurons release neurotransmitters that diffuse into the synapse and bind receptors on…

Answered: (b) Describe or draw the response you…

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter4: Principles Of Neural And Hormonal Communication

Section4.3: Action Potentials

Problem 2CYU

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Assume presynaptic excitatory neuron A terminates on a postsynaptic cell near the axon hillock and presynaptic excitatory neuron B terminates on the same postsynaptic cell on a dendrite located on the side of the cell body opposite the axon hillock. Explain why rapid firing of presynaptic neuron A could bring the postsynaptic neuron to threshold through temporal summation, thus initiating an action potential, whereas firing of presynaptic neuron B at the same frequency and the same magnitude of EPSPs may not bring the postsynaptic neuron to threshold.
If the postsynaptic cell's plasma membrane were to become substantially more permeable to Na+, you would expect the membrane potential to [depolarize, hyperpolarize] __________________. You would expect the membrane potential to depolarize if the extracellular K+ concentration were to [increase, decrease] ______________. a.) hyperpolarize, decrease b.) depolarize, decrease c.) depolarize, decrease d.) hyperpolarize, increase
Describe two mechanisms by which ion channels are gated
During the _____ phase of an action potential, the membrane potential is more positive than the resting potential, but potassium is leaving the cell and sodium is no longer entering, so membrane potential is _____.
Match each description with the appropriate receptor
The input region lacks _________________, but contains _____________________, Group of answer choices A. Ligand-gated channels, voltage gated channels B. K+ leak channels, voltage gated channels C. Voltage-gated channels, ligand gated channels D. Ligand-gated channels, K+ leak channels
Explain the following; If a drug partly blocks a membrane’s potassium channels, how does it affect the action potential? Suppose the threshold of a neuron were the same as the neuron’s resting potential. What would happen? At what frequency would the cell produce action potentials?
What is the difference between inactivate and closed Na+ channels?Explain how a salty flavor is transduced into an action potential. Describe each step in an action potential
List the membrane potential value that would coincide with the following events: a. Resting membrane potential b. Graded potentials c. Threshold for action potentials d. Opening of Potassium Channels/Closing of sodium channels during action potential.
Match the receptor in column A with its ligand in column B.
The following graph represents a membrane potential recording in the dark, then during a brief flash of flight at the time indicated by the arrow. This could be a recording from a: a) rod cell b) bipolar cell c) ganglion cell d) any of the above
describe how the membrane potential varies over time AND distance as a graded potential move across the cell body of a neuron. Describe the movement of ions within the cell body as the graded potential moves away from the stimulus

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