NMDA receptor agonists depolarise the lamprey spinal neurons by:Group of answer choicesopening channels permeable to sodium and calcium ionsopening chloride channelsclosing all calcium channelsclosing slow serotonin channelsopening dopamine channels
Question
NMDA receptor agonists depolarise the lamprey spinal neurons by:Group of answer choicesopening channels permeable to sodium and calcium ionsopening chloride channelsclosing all calcium channelsclosing slow serotonin channelsopening dopamine channels
Solution 1
NMDA receptor agonists depolarise the lamprey spinal neurons by opening channels permeable to sodium and calcium ions.
Here's a step-by-step explanation:
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NMDA receptors are a type of ionotropic glutamate receptor. They are named after the agonist molecule N-Methyl-D-aspartate (NMDA) that binds to them.
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When an NMDA receptor agonist binds to the receptor, it triggers the opening of the ion channel. This is a pore in the neuron's cell membrane.
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This channel is permeable to both sodium (Na+) and calcium (Ca2+) ions.
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The opening of the channel allows these ions to flow into the neuron.
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The influx of positively charged ions depolarises the neuron. This means it reduces the difference in voltage between the inside and outside of the neuron.
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This depolarisation is a key step in the transmission of signals along the neuron.
Solution 2
NMDA receptor agonists depolarise the lamprey spinal neurons by opening channels permeable to sodium and calcium ions.
Here's a step-by-step explanation:
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NMDA receptors are a type of glutamate receptor, which are key for controlling synaptic plasticity and memory function.
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When an NMDA receptor agonist binds to the receptor, it activates it.
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This activation opens ion channels in the neuron's membrane.
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These channels are permeable to both sodium (Na+) and calcium (Ca2+) ions.
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The influx of these positively charged ions into the neuron causes it to depolarise, i.e., the neuron's internal voltage becomes more positive.
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This depolarisation is a key step in the transmission of signals along the neuron and ultimately across neural networks.
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