Neuron 1 is an excitatory neuron - VCE - SSCE Biology - Question 10 - 2013 - Paper 1
Question 10
Neuron 1 is an excitatory neuron. Neuron 2 is an inhibitory neuron.
If simultaneous action potentials pass down both neurons, you would expect
A. a response in targe... show full transcript
Worked Solution & Example Answer:Neuron 1 is an excitatory neuron - VCE - SSCE Biology - Question 10 - 2013 - Paper 1
Step 1
A. a response in target cell 3.
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Answer
In this scenario, neuron 1 is excitatory while neuron 2 is inhibitory. Since neuron 2 is engaged simultaneously with the excitatory action of neuron 1, the overall effect could potentially neutralize the excitatory response. Therefore, there may not be a clear response in target cell 3 due to the opposing action of the inhibitory neuron.
Step 2
B. an action potential to be generated at point Z.
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Answer
It is unlikely that an action potential would be generated at point Z because the inhibitory effect of neuron 2 may prevent the transmission of an action potential, especially if it occurs at a critical junction.
Step 3
C. diffusion of a neurotransmitter to target cell 2.
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The excitatory neuron 1 would likely release neurotransmitters at its synapse, facilitating the diffusion of these neurotransmitters to the target cells, which may include target cell 2, depending on the synaptic connections. However, the inhibitory action of neuron 2 could influence the overall response.
Step 4
D. release of a neurotransmitter at point X.
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It is expected that neuron 1 would release neurotransmitters at point X due to its excitatory nature. This release is crucial in neurotransmission but might be dampened or countered by the activity of neuron 2.
