The bulb - like structures present at the terminals of an axon are called the

Options

A. Synaptic knobs
B. Axon Hillock
C. Synaptic vesicles
D. Dendrites

Answer

To solve the question regarding the bulb-like structures present at the terminals of an axon, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of a Neuron**:
- A neuron is composed of three main parts: dendrites, cell body, and axon.

2. **Identify the Parts of the Axon**:
- The axon is a long, slender projection that conducts electrical impulses away from the cell body. At the end of the axon, there are structures known as axon terminals.

3. **Locate the Bulb-like Structures**:
- The axon terminals are the endpoints of the axon. At these terminals, there are bulb-like structures.

4. **Name the Bulb-like Structures**:
- These bulb-like structures at the axon terminals are specifically called "synaptic knobs."

5. **Conclusion**:
- Therefore, the correct answer to the question is that the bulb-like structures present at the terminals of an axon are called **synaptic knobs**.