cell, receptors, nerve tissue @ Pixabay

Presynaptic autoreceptors are a type of receptor that is located on the presynaptic membrane. When activated, these receptors will usually inhibit neurotransmitter release from the axon terminal. This means that if you have low levels of serotonin in your body, activating this type of receptor can help maintain homeostasis and balance chemicals within the brain by reducing how much serotonin gets released to even out levels in higher parts of your brain.

brain, think, human @ Pixabay

Autoreceptors are a type of receptor that is located on the presynaptic membrane. When activated, these receptors will usually inhibit neurotransmitter release from the axon terminal. 

Presynaptic autoreceptors also serve as feedback mechanisms for neurons by regulating neurotransmission activity when it is too much or not enough stimulation occurring at their synapses with other types of cells. They accomplish this by detecting changes in ionic flow across postsynaptic membranes which alters what they do themselves.

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