state the 3rd and 4th mechanisms of neurotransmission?

The 3rd mechanism of neurotransmission is reuptake, where neurotransmitters are taken back up into the presynaptic neuron after they have been released into the synaptic cleft. This process helps to regulate the levels of neurotransmitters in the synapse.

The 4th mechanism of neurotransmission is enzymatic degradation, where enzymes in the synaptic cleft break down neurotransmitters into inactive metabolites. This process helps to quickly terminate the action of neurotransmitters and prevent them from continuously stimulating the postsynaptic neuron.

3. Reuptake: Neurotransmitters are actively transported back into the presynaptic neuron after being released into the synaptic cleft. This process helps to terminate neurotransmission and prevent excessive activation of the postsynaptic neuron.
4. Enzymatic degradation: Neurotransmitters can be broken down by enzymes in the synaptic cleft. This process also helps to terminate neurotransmission and prevent excessive activation of the postsynaptic neuron.