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The terms antagonist/agonist only apply to 'exogenous' compounds, namely drugs and toxins, and not neurotransmitters - which are commonly classed according to whether they are excitatory or inhibitory. Examples of a the latter include GABA and glycine.
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∙ 14y ago
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∙ 11y agoGABA :)
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What is excitatory messages?
There are two kinds of neurotransmitters - INHIBITORY and EXCITATORY. Excitatory neurotransmitters are not necessarily exciting - they are what stimulate the brain. Those that calm the brain and help create balance are called inhibitory. Inhibitory neurotransmitters balance mood and are easily depleted when the excitatory neurotransmitters are overactive.
WHAT are neurotransmitters are inhibitory?
neurotransmitters are called Inhibitory if the activation of the receptors causes hyper-polarisation and depresses action potential generation (slows down processes)
Neurotransmitters categorized as inhibitory would not be expected to?
Hyperpolarize the Membrane
What happens when neurotransmitters communicate an excitatory message to the postsynaptic neuron?
When neurotransmitters communicate an inhibitory message to the postsynaptic neuron:
Inhibitory neurotransmitters of the CNS act by opening gates?
K+ or Cl-
Neurotransmitters communicate an inhibitory message to the postsynaptic neuron?
reuptake is inhibited
Neurotransmitters categorized as inhibitory are expected to?
Inhibitory neurotransmitters prevent the firing of neurons by binding with certain receptors, causing the influx of chloride ions to hyperpolarize the neuron. When this happens, it requires a much larger excitatory signal to override the inhibitory effects in order to allow the neuron to fire.
Are neurotransmitters always stimulatory?
No. For example, the amino acid derivative gamma aminobutyric acid has an inhibitory effect on neurons.
How does heroin affect the Synapse?
In a regular nerve synapse, not exposed to any antigens and in a healthy body, inhibitory, or preventative, neurotransmitters are released constantly to prevent the release of dopamine (<----neurotransmitters), a natural painkiller(or mood-lifter). When the body is severely damaged or injured, natural opiates are released and travel to the inhibitory neurotransmitters. When the opiates arrive at the inhibitory neurotransmitters, they enter the opiate receptors. Once this occurs, the dopamine neurotransmitters can be released and travel to dopamine receptors, to travel through neurons to the rest of the body. Once heroin is brought into the body, people feel a short, but immediate, high. The heroin simulates natural opiates. The heroin travels through the body to the inhibitory neurotransmitters and to the opiate receptors. Once the body has received the heroin, the inhibitory neurotransmitters are no longer released, at least until the heroin wears off. The dopamine is now released and the drug user feels a high from the effects of the dopamine. There is a great source that explains not only the effects of heroin on the synapse, but several other drugs too.
What is the role of GABA in huntington's disease?
GABA is an inhibitory neurotransmitter that plays a role in the basal ganglia of the brain. The basal ganglia is related with movement and coordinates with the cerebellum in order to control our movements. GABA neurotransmitters are destroyed in Huntington's disease, which causes an imbalance in motions because of the decreased inhibitory neurotransmitters. This causes the involuntary movements that are characteristic of Huntington's.
What is an anxiety relieving inhibitory neurotransmitter?
γ-Aminobutyric acid (GABA) and Serotonin (5-HT) are anxiety releiving neurotransmitters. Benzodiazepines and serotonin reuptake inhibitors (SSRIs) are the primary treatments for anxiety disorders. Benzodiazepines are GABA agonists and SSRIs are 5-HT agonists - i.e. they promote the effects of these inhibitory neurotransmitters in the brain, particularly the limbic system.
Why can some neurotransmitters be both excitatory and inhibitory?
Excitatory neurotransmitter usually is acetylcholine. To get inhibitory responses in a nerve cell, the arrangement of receptors is different. The study of nervous system in detail will provide you exact answer to your question.
