When the axon terminal of a modulatory neuron (cell M) terminates close to the axon terminal of a presynaptic cell (cell P) and decrease the amount of neurotransmitter released by cell P. the resulting type of modulation is called

Presynaptic inhibition refers to mechanisms that suppress release of neurotransmitters from axon terminals or varicosities. It involves binding of chemical messengers to inhibitory receptors at transmitter release sites on the axon. Presynaptic inhibition is a significant synaptic event within the enteric microcircuits of the gastric corpus and antrum, as well as the small and large intestine and rectum of the guinea pig. It is a mechanism that prevents runaway excitation in feed-forward synaptic circuits. Presynaptic inhibitory receptors are found at fast and slow excitatory synapses, at inhibitory synapses, and at neuromuscular junctions.

mickymike92 mickymike92 · Answer 2 · 2022-01-13T13:26:58+01:00

Presynaptic inhibition occurs when the axon terminal of a modulatory neuron terminating close to the axon terminal of a presynaptic cell decreases the amount of neurotransmitter released by the presynaptic cell.

Presynaptic Inbition

Presynaptic inhibition refers to suppression or inhibition of the release of neurotransmitters from one axon terminals to another.

Presynaptic inhibitory receptors are commonly found at inhibitory synapses, fast and slow excitatory synapses and at neuromuscular junctions.

Steps in presynaptic inhibition

Transmission of action potential to axon 1
release of a neurotransmitter from axon 1 into the synapse
neurotransmitter released acts at receptors on axon 2 to suppress release of transmitter from axon 2.

Therefore, when the axon terminal of a modulatory neuron terminates close to the axon terminal of a presynaptic cell and decrease the amount of neurotransmitter released by the presynaptic cell, the resulting type of modulation is called presynaptic inhibition.

Learn more about presynaptic inhibition at: https://brainly.com/question/1287151