18 Questions
Which part of a neuron is responsible for receiving information?
Dendrites
In a neuron, what is the function of the Axon?
Pass information along to other neurons
Which type of neuron has one axon and many dendrites emerging from the soma?
Multipolar neurons
What is the role of sensory neurons in the nervous system?
Carry information from sensory receptors toward the CNS
Which component of a neuron carries information to the terminal buttons?
Axon
What is the main process involved in brain development regarding connections between neurons?
Reduction of connections through neural pruning
What is the main function of sodium-potassium pumps on the cell membrane?
Actively transporting Na+ ions out of the cell and K+ ions into the cell
During resting potential, what ions are more concentrated inside the cell?
K+
What is the significance of stimulation arriving at the dendrites of a neuron?
Determines whether the neuron will fire or not
Which type of transporter actively transports molecules across a membrane?
Sodium-potassium pumps
What is the ratio of Na+ ions pumped out of the cell to K+ ions pumped into the cell by sodium-potassium pumps?
3 Na+ out for every 2 K+ in
Which event occurs when many different neurons stimulate the dendrites of a neuron?
Decision on whether to fire or not based on excitatory or inhibitory signals
What is the role of Nodes of Ranvier in the transmission of the action potential?
Speeding up the transmission of the action potential
What initiates the opening of sodium ion channels in a neuron?
Excitatory input to the soma
At what membrane potential does the sodium ions rush into the cell during an action potential?
70mV
What is the immediate consequence of potassium ions exiting the cell during an action potential?
Hyperpolarization
What is the function of sodium-potassium pumps after an action potential is generated?
Maintaining resting membrane potential
Which drug may interfere with the function of sodium channels and affect action potentials in neurons?
Narcotics
Learn about the mechanisms involved in maintaining the resting potential of a cell membrane, focusing on ion channels and sodium-potassium pumps. Understand how Na+ and K+ ions play a crucial role in this process.
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