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Mastering the Resting Membrane Potential

10 Questions

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Mastering the Resting Membrane Potential

Created by

@SkillfulSanctuary

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Questions and Answers

Which of the following statements accurately describes the resting membrane potential of neurons?

The outside of the cell is negatively charged compared to the inside.

The outside of the cell is positively charged compared to the inside.

The inside of the cell is negatively charged compared to the outside. (correct)

The inside of the cell is positively charged compared to the outside.

What is the voltage reference point used to measure the membrane potential?

The absolute number of negative charges on either side of the membrane.

The excess charge on the inside of the cell.

The excess charge on the outside of the cell. (correct)

The magnitude of the potential difference across the membrane.

If the inside of a neuron has an excess of negative charge and the potential difference across the membrane is 70 mV, what is the membrane potential stated as?

0 mV

Positive 70 mV

-70 mV (correct)

70 mV

What do volts measure in relation to the membrane potential?

The difference in charge across a membrane. Signup and view all the answers

Does a membrane potential of -70 mV indicate the number of negative and positive charges on either side of the membrane?

No Signup and view all the answers

Which of the following accurately describes the resting membrane potential of neurons?

The inside of the cell is negatively charged with respect to the outside. Signup and view all the answers

What is the voltage reference point used to measure the membrane potential?

The extracellular fluid Signup and view all the answers

What does a membrane potential of -70 mV indicate?

The inside of the cell has an excess of negative charge. Signup and view all the answers

What do volts measure in relation to the membrane potential?

The difference in charge across the membrane. Signup and view all the answers

What is the magnitude of the resting membrane potential?

70 mV Signup and view all the answers

Study Notes

Neuron Resting Membrane Potential

The resting membrane potential of neurons is typically around -70 mV.

Measuring Membrane Potential

The voltage reference point used to measure the membrane potential is the outside of the cell.

Interpreting Membrane Potential

A membrane potential of -70 mV indicates that the inside of the neuron has an excess of negative charge compared to the outside.
The magnitude of the resting membrane potential is around -70 mV.

Understanding Volts

Volts measure the potential difference, or voltage, across the cell membrane.
A membrane potential of -70 mV does not directly indicate the number of negative and positive charges on either side of the membrane, but rather the difference in electrical potential between the inside and outside of the cell.

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Description

Test your knowledge on the resting membrane potential in neurons. Understand the concept of potential difference across plasma membranes and the polarity of the membrane.