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Neurobiology: Synapse Definition and Types

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Neurobiology: Synapse Definition and Types

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Questions and Answers

Which of the following is NOT a type of synapse?

Chemical synapse

Electrical synapse

Mechanical synapse (correct)

None of the above

What is the width of the junctional area in a synapse?

80-90 nm

30-50 nm (correct)

60-70 nm

10-20 nm

Which of the following is NOT considered an important chemical transmitter in the context of synapses?

Endorphins (correct)

Serotonin

Acetylcholine

Dopamine

Where are electrical synapses primarily found?

Heart and smooth muscles Signup and view all the answers

What is the membrane of the neuron that transmits impulses towards the synapse called?

Presynaptic membrane Signup and view all the answers

What is the main function of the chemical synapse?

Transmitting impulses through release of chemical substance Signup and view all the answers

What is the name of the swelling at the presynaptic nerve ending?

Synaptic knob Signup and view all the answers

In which type of synapse does the presynaptic knob end around the dendrites of the post synaptic neuron?

Axodeneretic synapse Signup and view all the answers

What is the function of the clear type of synaptic vesicles?

Contain chemical transmitters that act for seconds Signup and view all the answers

What happens when the action potential reaches the synaptic knob?

Ca² influx into the cytoplasm Signup and view all the answers

What is the result of the chemical transmitter moving to the receptors on the postsynaptic membrane?

Generation of postsynaptic potential Signup and view all the answers

What determines if the post synaptic receptors cause excitation or inhibition in the post synaptic neuron?

The nature of the released chemical transmitter Signup and view all the answers

What causes excitatory post synaptic potential (EPSP)?

Closing of Na+ channels allowing Na+ influx Signup and view all the answers

What is stored in the synaptic vesicles that belong to granular type?

Slow-acting neuropeptides Signup and view all the answers

What is attached to specific release sites at the presynaptic membrane?

Synaptic vesicles Signup and view all the answers

What causes one of the following: Opening of Na+ channels allowing Na+ influx?

Excitatory post synaptic potential (EPSP) Signup and view all the answers