The correct sequence of the membranes of the nerve of PNS from inside to outside is

Options

A. Axolemma `to` neurilemma `to` endoneurium `to` perineurium `to` epineurium
B. Axolemma `to` neurilemma `to` endoneurium `to` epineurium `to` perineurium
C. `Neurilemma `to` axolemma `to` endoneurium `to` perineurium `to` epineurium
D. Axolemma `to` neurilemma `to` perineurium `to` endoneurium `to` epineurium

Answer

To determine the correct sequence of the membranes of the peripheral nervous system (PNS) nerves from inside to outside, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the innermost membrane**: The first layer from the inside is the **Exolema**. This is also known as the plasma membrane of the axon. It is the outermost layer of the axon itself.

2. **Next layer**: The second layer is the **Neurilemma** (or Neurolema). This is the outermost nucleated cytoplasmic layer of Schwann cells that surrounds the axon.

3. **Third layer**: The third layer is the **Endoneurium**. This is a delicate layer of connective tissue that surrounds each individual nerve fiber (axon) and is also referred to as the endoneurial channel.

4. **Fourth layer**: The fourth layer is the **Perineurium**. This layer surrounds a group of axons, forming a fascicle, and provides an additional protective barrier.

5. **Outermost layer**: The outermost layer is the **Epineurium**. This is a dense irregular connective tissue layer that surrounds the entire nerve, providing protection and support.

### Final Sequence:
The correct sequence of the membranes from inside to outside is:
1. Exolema
2. Neurilemma
3. Endoneurium
4. Perineurium
5. Epineurium

### Answer:
**The correct sequence of the membranes of the nerve of PNS from inside to outside is: Exolema, Neurilemma, Endoneurium, Perineurium, Epineurium.**