Problem: The plasma membrane of a neuron is more permeable to potassium ions than to sodium ions because the membrane has:A. more ligand-gated potassium ion channels.B. more voltage-gated sodium ion channels.C. more carrier molecules for potassium ions.D. more potassium leakage channels.E. fewer voltage-gated sodium ion channels.

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FREE Expert Solution

Potassium and sodium ions are known to have essential roles in the resting potential of a neuron. In mammals, the intracellular concentration for potassium and sodium ions are 140mM and 15mM, respectively; their external concentrations are 5mM for potassium and 150mM for sodium ions.

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Problem Details

The plasma membrane of a neuron is more permeable to potassium ions than to sodium ions because the membrane has:

A. more ligand-gated potassium ion channels.

B. more voltage-gated sodium ion channels.

C. more carrier molecules for potassium ions.

D. more potassium leakage channels.

E. fewer voltage-gated sodium ion channels.

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Neurons and Action Potentials concept. You can view video lessons to learn Neurons and Action Potentials. Or if you need more Neurons and Action Potentials practice, you can also practice Neurons and Action Potentials practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Haro's class at UTSA.