Question

Why are medullated nerve fibres more efficient than non-medullated nerve fibres ? Explain.​

Answer 1

ᴍᴇᴅᴜʟʟᴀᴛᴇᴅ ɴᴇʀᴠᴇ ғɪʙʀᴇs

1. Medullary sheath is present.

2. They appear white in fresh state.

3. Nodes of Ranvier are present at intervals.

4. Collateral nerve fibres are present.

5. They are generally present in the white matter of brain and spinal cord and in cranial and spinal nerves.

6. They carry impulses faster than non- medullated nerve fibres.

ɴᴏɴ -ᴍᴇᴅᴜʟʟᴀᴛᴇᴅ ɴᴇʀᴠᴇ ғɪʙʀᴇs

1. Medullary sheath is absent.

2. They appear grey in fresh state.

3. Nodes of Ranvier are absent.

4. Collateral nerve fibres are absent.

5. They are present in autonomic nerves.

6. They carry impulses slower than medullated nerve fibres.

ɴᴏᴡ ғʀᴏᴍ ᴅɪғғᴇʀᴇɴᴄᴇs ʏᴏᴜ ᴄᴀɴ ᴄᴏɴᴄʟᴜᴅᴇ ᴛʜᴀᴛ ᴡʜʏ ᴍᴇᴅᴜʟʟᴀᴛᴇᴅ ɴᴇʀᴠᴇ ғɪʙʀᴇs ᴀʀᴇ ᴍᴏʀᴇ ᴇғғɪᴄɪᴇɴᴛ...

Answer 2

Answer:

My answer is same as the above one.