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Presynaptic Neurotransmission Quiz

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Questions and Answers

What is the main role of the presynaptic cell in neurotransmission?

Generating an electrical signal for transmission

Receiving chemical signals from other neurons

Converting the action potential into a chemical signal (correct)

Amplifying the action potential

Where does the transformation from electrical to chemical signal take place in the presynaptic cell?

Dendrites

Cell body

Synaptic cleft

Axon terminal (correct)

How is neurotransmission often described due to the transformation from electrical to chemical signal?

Purely electrical

Mechanical in nature

Biological in nature

Electrochemical in nature (correct)

What type of ion channels are crucial in initiating the release of neurotransmitters at the axon terminal?

Voltage-gated calcium channels Signup and view all the answers

What is the main role of calcium ions at the axon terminal?

Initiating the release of neurotransmitters Signup and view all the answers

What is the ionic charge of calcium ions that enter the cell through voltage-gated calcium channels?

2+ Signup and view all the answers

What is the chemical gradient that drives calcium ions into the cell at the axon terminal?

Calcium being much more highly concentrated outside the cell Signup and view all the answers

What is the function of neurotransmitters released at the axon terminal?

Carrying the signal across the synaptic cleft to the postsynaptic neuron Signup and view all the answers

Presynaptic Neurotransmission Quiz

Choose a study mode

Podcast

Questions and Answers

What is the main role of the presynaptic cell in neurotransmission?

Where does the transformation from electrical to chemical signal take place in the presynaptic cell?

How is neurotransmission often described due to the transformation from electrical to chemical signal?

What type of ion channels are crucial in initiating the release of neurotransmitters at the axon terminal?

What is the main role of calcium ions at the axon terminal?

What is the ionic charge of calcium ions that enter the cell through voltage-gated calcium channels?

What is the chemical gradient that drives calcium ions into the cell at the axon terminal?

What is the function of neurotransmitters released at the axon terminal?

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