Drugs that affect the reuptake of neurotransmitters are in...

Name: Problem 11, Chapter 13: Becker's World of the Cell
Uploaded: 2023-12-31T23:22:42-08:00
Duration: 2 min 11 s
Channel: Bryan Valdivia
Description: Drugs that affect the reuptake of neurotransmitters are in widespread use for the treatment of attention-deficit/hyperactivity disorder and clinical depression. In molecular terms, explain what effect(s) such reuptake inhibitors have on postsynaptic neurons, assuming that the neurotransmitter in question is excitatory for that postsynaptic neuron.

Drugs that affect the reuptake of neurotransmitters are in widespread use for the treatment of attention-deficit/hyperactivity disorder and clinical depression. In molecular terms, explain what effect(s) such reuptake inhibitors have on postsynaptic neurons, assuming that the neurotransmitter in question is excitatory for that postsynaptic neuron.

Key Concepts

Excitatory Neurotransmission

In excitatory neurotransmission, the neurotransmitter binds to receptors that trigger depolarization of the postsynaptic neuron, increasing the likelihood that the neuron will fire an action potential. With enhanced neurotransmitter levels due to reuptake inhibition, the excitatory signal is prolonged and intensified, leading to stronger postsynaptic depolarization.

Postsynaptic Potentials

These are changes in the membrane potential of the postsynaptic neuron occurring after neurotransmitter binding. In the case of excitatory neurotransmitters, the postsynaptic potential is depolarizing. When reuptake is inhibited, the increased concentration and prolonged receptor activation lead to larger or more sustained excitatory postsynaptic potentials, thereby affecting neuronal signaling and network activity.

Neurotransmitter Reuptake

This refers to the process by which neurotransmitters released into the synaptic cleft are removed from the extracellular space by specialized transport proteins. The reabsorption helps terminate the signal transmitted to the postsynaptic neuron and regulates the overall concentration of neurotransmitters in the synaptic cleft.

Reuptake Inhibitors

Reuptake inhibitors block the transporter proteins that normally clear neurotransmitters from the synaptic cleft. By preventing or slowing the removal of the neurotransmitter, these drugs increase its availability and prolong its presence in the synaptic space, thereby enhancing receptor activation on postsynaptic neurons.

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