Master the Resting Membrane Potential

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Which of the following factors contributes to maintaining the resting membrane potential (RMP)?

The semi-permeability of the membrane

The activity of the Na+ K+ ATPase pump

The concentration of intracellular impermeable anions

All of the above (correct)

What is the typical resting membrane potential (RMP) of nerve cells?

-70 mV (correct)

-50 mV

-90 mV

-30 mV

Which process involves reducing the negativity of the cell?

Depolarization (correct)

Polarization

Hyperpolarization

Repolarization

Which stage of an action potential involves a rapid rise in potential in a positive direction?

Depolarization Signup and view all the answers

What is the characteristic of action potentials that makes them all-or-none responses?

Summation Signup and view all the answers

What is the membrane potential at which an action potential is inevitable?

Threshold level Signup and view all the answers

During which period of the refractory period is a stronger stimulus required to generate another action potential?

Relative refractory period Signup and view all the answers

What is the characteristic of local potentials in excitable cells?

They are graded responses Signup and view all the answers

What type of summation occurs when multiple stimuli fire simultaneously and contribute to the generation of a local potential?

Spatial summation Signup and view all the answers

Which type of potential depolarizes the membrane?

Excitatory post-synaptic potentials (EPSPs) Signup and view all the answers

What is the main difference between local potentials and action potentials?

Local potentials are not propagated, while action potentials travel along the membrane. Signup and view all the answers

Which factors can alter the changes associated with action potentials?

Changes in sodium (Na+), potassium (K+), and calcium (Ca2+) concentrations Signup and view all the answers

Master the Resting Membrane Potential

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Questions and Answers

Which of the following factors contributes to maintaining the resting membrane potential (RMP)?

What is the typical resting membrane potential (RMP) of nerve cells?

Which process involves reducing the negativity of the cell?

Which stage of an action potential involves a rapid rise in potential in a positive direction?

What is the characteristic of action potentials that makes them all-or-none responses?

What is the membrane potential at which an action potential is inevitable?

During which period of the refractory period is a stronger stimulus required to generate another action potential?

What is the characteristic of local potentials in excitable cells?

What type of summation occurs when multiple stimuli fire simultaneously and contribute to the generation of a local potential?

Which type of potential depolarizes the membrane?

What is the main difference between local potentials and action potentials?

Which factors can alter the changes associated with action potentials?

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