The bulb like structures into which the telodendria end up are 

Options

A. synaptic knobs
B. terminal boutons
C. both 1 & 2
D. none

Answer

To answer the question "The bulb-like structures into which the telodendria end up are", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Telodendria**:
- Telodendria are the terminal branches of an axon. They are the endpoints of the axon where neurotransmitters are released to communicate with other neurons.

2. **Identifying the Structure**:
- At the end of the telodendria, there are bulb-like structures. These structures are crucial for the transmission of nerve impulses.

3. **Function of Terminal Buttons**:
- These bulb-like structures are known as terminal buttons or synaptic terminals. They contain synaptic vesicles filled with neurotransmitters.

4. **Role in Synaptic Transmission**:
- The terminal buttons play a vital role in synaptic transmission, which is the process of transmitting signals from one neuron to another. When an impulse reaches the terminal buttons, neurotransmitters are released into the synapse, allowing communication between neurons.

5. **Conclusion**:
- Therefore, the bulb-like structures into which the telodendria end are called terminal buttons or synaptic terminals.

### Final Answer:
The bulb-like structures into which the telodendria end up are called **terminal buttons** (or **synaptic terminals**).

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