17 Questions
What is the role of the electrical gradient in nerve impulse transmission?
To pull sodium ions into the cell
What type of gated channel opens in response to a neurotransmitter binding to its receptor?
Ligand gated channel
What is the state of a neuron prior to the sending of a nerve impulse?
Resting potential
What is the result of a stimulation beyond the threshold of excitement?
Massive depolarization
What is the term for the rapid depolarization of a neuron?
Action potential
What type of gated channel opens in response to changes in membrane potential?
Voltage gated channel
What happens immediately after an action potential in a neuron?
Sodium channels are quickly closed
What is the role of the sodium-potassium pump in a neuron?
To maintain the resting potential
What is the characteristic of an action potential in terms of its amplitude and velocity?
Independent of the intensity of the stimulus
What is the function of the refractory period in a neuron?
To prevent signals from traveling in both directions down the axon at once
What is the direction of potassium ions flow during the return of the neuron to its resting state?
Out of the neuron
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
What type of synapse is more abundant in the human nervous system?
Chemical Synapse
What is the effect of Inhibitory Post-Synaptic Potentials (IPSPs) on the neuron?
Make an action potential less likely
What occurs at the nodes of Ranvier during the transmission of a nerve impulse?
The action potential is regenerated
What is the function of the synapse in the nervous system?
To allow chemical messages to cross from one neuron to another
What is the period during which the membrane cannot produce an action potential?
Absolute Refractory Period
Test your understanding of the resting potential of a neuron, the electrical and concentration gradients, and the three main types of gated channels. Learn how these components work together to regulate the transmission of nerve impulses.
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