Neuron Resting Potential and Gated Channels

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What is the role of the electrical gradient in nerve impulse transmission?

To push sodium ions out of the cell

To pull sodium ions into the cell (correct)

To maintain a constant concentration of potassium ions

To decrease the membrane potential

What type of gated channel opens in response to a neurotransmitter binding to its receptor?

Ligand gated channel (correct)

Mechanically gated channel

Graded potential channel

Voltage gated channel

What is the state of a neuron prior to the sending of a nerve impulse?

Threshold of excitement

Hyperpolarization

Depolarization

Resting potential (correct)

What is the result of a stimulation beyond the threshold of excitement?

Massive depolarization Signup and view all the answers

What is the term for the rapid depolarization of a neuron?

Action potential Signup and view all the answers

What type of gated channel opens in response to changes in membrane potential?

Voltage gated channel Signup and view all the answers

What happens immediately after an action potential in a neuron?

Sodium channels are quickly closed Signup and view all the answers

What is the role of the sodium-potassium pump in a neuron?

To maintain the resting potential Signup and view all the answers

What is the characteristic of an action potential in terms of its amplitude and velocity?

Independent of the intensity of the stimulus Signup and view all the answers

What is the function of the refractory period in a neuron?

To prevent signals from traveling in both directions down the axon at once Signup and view all the answers

What is the direction of potassium ions flow during the return of the neuron to its resting state?

Out of the neuron Signup and view all the answers

What is the term for the jumping of an action potential from one node to another in the process of nerve impulse transmission?

Saltatory Conduction Signup and view all the answers

What type of synapse is more abundant in the human nervous system?

Chemical Synapse Signup and view all the answers

What is the effect of Inhibitory Post-Synaptic Potentials (IPSPs) on the neuron?

Make an action potential less likely Signup and view all the answers

What occurs at the nodes of Ranvier during the transmission of a nerve impulse?

The action potential is regenerated Signup and view all the answers

What is the function of the synapse in the nervous system?

To allow chemical messages to cross from one neuron to another Signup and view all the answers

What is the period during which the membrane cannot produce an action potential?

Absolute Refractory Period Signup and view all the answers

Neuron Resting Potential and Gated Channels

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