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MCAT Biological and Biochemical Foundations of Living Systems Flashcards: 2a Membrane Potential Electrochemical Gradients

Study 2a Membrane Potential Electrochemical Gradients in MCAT Biological and Biochemical Foundations of Living Systems with focused flashcards that help you recognize the idea, recall the key rule, and apply it in practice-style prompts.

QUESTION

What is the typical resting membrane potential magnitude for many neurons?

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ANSWER

Approximately −70 mV-70\ \text{mV}. This value arises from the balance of ion concentrations and permeabilities, particularly high K+^+ conductance.

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MCAT Biological and Biochemical Foundations of Living Systems: Foundational Concept 2: Cells and Cellular Organization

You are hereMembrane Potential and Electrochemical Gradients (2A)24 cards

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This deck focuses on 2a Membrane Potential Electrochemical Gradients, giving you a quick way to review the definitions, rules, and examples that matter most for MCAT Biological and Biochemical Foundations of Living Systems.

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Work through these flashcards in short sessions. Try to answer each prompt before flipping the card, then revisit any cards you miss until the explanation feels automatic.

Practice questions

1 of 50Practice questions for this set
In a patch-clamp experiment, a neuron is initially at rest (−70 mV). A toxin that selectively blocks voltage-gated K+^+ channels is applied. When an action potential is triggered by a brief current injection, the repolarization phase becomes slower and the after-hyperpolarization is reduced. Which statement best explains the changes in membrane potential observed?
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