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Synaptic Communication Quiz

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Questions and Answers

Which direction does communication at a synapse proceed?

In random directions

From the membrane of the other cell to the terminal button

In both directions simultaneously

From the terminal button to the membrane of the other cell (correct)

What is the function of the axon?

Carries information from the cell body to the terminal buttons (correct)

Transmits electrical signals to neighboring cells

Carries information from the terminal buttons to the cell body

Acts as a protective covering for the cell body

What is an action potential?

A type of synapse

A protective covering for the axon

A brief electrical/chemical event that starts at the end of the axon and travels toward the terminal buttons (correct)

A long-lasting electrical/chemical event that starts at the terminal buttons and travels toward the cell body

What happens to the size of an action potential when it reaches a point where the axon branches?

<p>It splits but does not diminish in size</p> Signup and view all the answers

What is the myelin sheath?

<p>A covering for the axon</p> Signup and view all the answers

Study Notes

Synapse and Axon Function

Communication at a synapse proceeds in one direction, from the presynaptic neuron to the postsynaptic neuron.
The axon functions as a transmission line, carrying the electrical signal away from the cell body to the axon terminals.

Action Potential

An action potential is a brief, regenerative, all-or-nothing electrical impulse that propagates along the length of the axon.
It is generated by a rapid change in the permeability of the axon membrane to sodium and potassium ions.

Action Potential at Axon Branching

When an action potential reaches a point where the axon branches, the size of the action potential remains the same, as the signal is not divided or decreased.

Myelin Sheath

The myelin sheath is a fatty, insulating substance produced by glial cells that wraps around the axon, facilitating the transmission of action potentials by reducing the electrical resistance of the axon.

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Description

Test your knowledge on communication at synapses and the role of axons in transmitting information. This quiz covers topics such as the direction of communication, the structure of axons, and the function of action potentials.