Neurons and the Nervous System

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Which structure is considered the basic unit of the nervous system?

Neuron

What is the function of the cell body in a neuron?

Reception of electrical messages

What is the resting membrane potential of a typical neuron?

-70 to -90 mV

What is the main cause of the electrical potential difference across the neuron membrane?

Presence of more negative ions on the inside of the membrane than on the outside

What happens when a strong stimulus is transmitted along the axon of a neuron?

It is transmitted to muscles, glands, or other neurons

Which ions diffuse across the neuron membrane to produce a charge difference and hence a potential difference?

K+ ions

What is the range of the electrical potential difference across the neuron membrane?

-50 to -70 mV

What is the term used to describe the excess of positive charge in the extracellular region and the excess of negative charge in the cytosol of a neuron?

Polarization

What is the net transfer of ions across the neuron membrane driven by?

Chemical concentration gradient

What is the function of the electrical force produced by the charge difference across the neuron membrane?

To repel K+ ions from cytosol to extracellular

Test your knowledge on neurons and their function in the nervous system with this quiz. Explore topics such as the structure of neurons, their specialized functions, and the transmission of electrical messages. Learn about the potential difference across the membrane of neurons and how it contributes to their functioning.

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