Axon endings release from ints synaptic vesicles , a neuro-transmitter substance known as

Options

A. Acetylcholine
B. Acetylcholinesterases
C. Inositol - 3 phosphate
D. Diacylglycerol

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the neurotransmitter substance that is released from the axon endings of neurons through synaptic vesicles.

2. **Identifying Neurotransmitters**: Neurotransmitters are chemical messengers that transmit signals across a synapse from one neuron to another. They play a crucial role in neural communication.

3. **Evaluating the Options**:
- **Option 1: Acetylcholine**: This is a well-known neurotransmitter involved in muscle activation and various brain functions.
- **Option 2: Acetylcholine Esterases**: This is an enzyme that breaks down acetylcholine, not a neurotransmitter itself.
- **Option 3: Inositol-3-phosphate**: This is a signaling molecule but not a primary neurotransmitter.
- **Option 4: Diacylglycerol**: This is also a signaling molecule involved in various cellular processes but is not classified as a neurotransmitter.

4. **Conclusion**: Based on the evaluation, the most common neurotransmitter released from axon endings is **acetylcholine**. Thus, the correct answer is acetylcholine.

5. **Final Answer**: The neurotransmitter substance known to be released from axon endings via synaptic vesicles is **acetylcholine**.

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