Describe the process of synaptic transmission. Support your answer with relevant illustration(s). 

Synaptic transmission is the process by which neurons communicate with each other or with other target cells such as muscles or glands. This communication occurs at specialized junctions called synapses, where the transmission of signals can be chemical or electrical. Chemical synaptic transmission is the most common form in the human nervous system and involves the release of neurotransmitters. The process of synaptic transmission can be broken down into several key steps:

### 1. Synthesis and Storage of Neurotransmitters
Neurotransmitters are chemical messengers synthesized in the presynaptic neuron. They are typically derived from precursors available in the neuron and converted into their active forms by specific enzymes. Once synthesized, these neurotransmitters are stored in synaptic vesicles located in the presynaptic terminal.

### 2. Arrival of Action Potential
When an action potential (electrical impulse) travels down the axon of the presynaptic neuron and reaches the axon terminal, it triggers the opening of voltage-gated calcium (Ca²⁺) channels. The depolarization caused by the action potential changes the electrical potential across the membrane, allowing Ca²⁺ ions to flow into the neuron.

### 3. Calcium Influx and Vesicle Fusion
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