A post-synaptic cell responds to an incoming signal by opening chloride gates. What will be the outcome? The cell will remain the same. The cell will depolarize. The cell will hyperpolarize.
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- When action potentials arrive at a synapse between a neuron and another cell, they stimulate the release of molecules of a ________ that diffuse over to that cell.The accelerating flow of _______ ions through gated channels across the membrane triggers an action potential. a. potassium b. sodium c. hydrogen d. a and bA hyperpolarized cell can be generated when: Group of answer choices A. ligand-gated ionotropic channels for Cl- open B. voltage-gated Cl- channels in the postsynaptic membrane open C. Na + flows into the cell down its concentration gradient D. an action potential is generated in the postsynaptic membrane.
- An influx of positive sodium ions eventually causes closing of the inactivation gates of voltage regulated sodium channels, stopping the influx of positive sodium ions, and thus the final stages of an action potential are regulated by _____ feedback.A channel opens on a postsynaptic membrane thatcauses a negative ion to enter the cell. What type of gradedpotential is this?a. depolarizingb. repolarizingc. hyperpolarizingd. non-polarizingWhich of the following phases of an action potential is correctly matched with the changes in ion movement and membrane potential? All of these are correctly matched. Phase 1 – sodium movement into the cell Phase 3 – potassium movement into the cell Phase 2 – sodium movement out of the cell
- The change in the electrical balance between the intra- and extra-cellular fluid that occurs when a neuron sends a message is called the _________________ potential. action resting electrical synapticAn influx of positive sodium ions causes opening of the activation gates of voltage regulated sodium channels resulting in a further influx of positive sodium ions, and thus the initial stages of an action potential are regulated by ______ feedback.During the resting state, a neuron is: polarized with sodium ions outside the cell and potassium ions inside the cell restoring the ionic conditions utilizing the sodium-potassium pump depolarizing and generating an action potential propagating the action potential repolarizing as potassium ions diffuse out of the cell
- The changes in membrane potential when a neuron is transmitting information is called ..... threshold action potential chemical potential resting potentialThe membrane potential caused by differences in ions across the plasma membrane of an electrically excitable cell (when not stimulated) is called: action potential resting membrane potential graded potential local potentialWhich of the following molecules is not involved in the maintenance of the resting membrane potential? a. potassium cations b. ATP c. voltage-gated ion channels d. calcium cations