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Neuronal Membrane Circuit Diagram Quiz

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Questions and Answers

What is the main reason for evolution to create voltage across neuronal membranes?

To support the formation of ionic concentration gradients

To regulate the movement of ions in and out of the cell

To maintain the resting membrane potential

To generate electrical signals (correct)

What is the simplified Nernst equation used for?

To determine the equilibrium potential of single ion species (correct)

To measure the ionic concentration gradients

To calculate the resting membrane potential

To calculate the membrane time constant

What is the net result of primary and secondary active transport in neuronal membranes?

Creation of voltage across the membranes (correct)

Regulation of membrane capacitance

Generation of electrical signals

Formation of ionic concentration gradients

What are the types of neuronal electrical signals mentioned in the text?

Passive and active signals Signup and view all the answers

What determines the magnitude of change for passive voltage changes in neuronal membranes?

The current injected Signup and view all the answers

What is the primary factor causing the membrane voltage to take time to change?

Membrane capacitance Signup and view all the answers

In the absence of capacitance and with only conductance, how would membrane voltage respond to current injection?

It would change instantly Signup and view all the answers

What does the value of 63% represent in relation to the membrane time constant (τ)?

The time taken to reach 1-1/e of Vmax Signup and view all the answers

How is the membrane time constant (τ) determined?

By both the membrane capacitance and resistance Signup and view all the answers

What is the function of current flow onto the capacitor (Ic) in altering the membrane voltage?

It adds or removes charge from the capacitor Signup and view all the answers