NEET PG DENTAL EXAM

Detailed explanation-1: -Answer and Explanation: Myelinated neurons conduct impulses faster than unmyelinated neurons because nerve impulses jump over the myelin sheath rather than travel through it, making the distance to the axon terminal shorter.

Detailed explanation-2: -In unmyelinated axons, the action potential travels continuously along the axons. For example, in unmyelinated C fibers that conduct pain or temperature (0.4–1.2 m in diameter), conduction velocity along the axon is 0.5–2.0 m/s (as fast as you walk or jog).

Detailed explanation-3: -Speed of transmission of nerve impulse The speed of transmission of nerve impulses is more in myelinated axons than in unmyelinated axons.

Detailed explanation-4: -C fibers are small-diameter fibers acting as nociceptors from the periphery to the central nervous system (CNS). The diameter of their axons ranges from 0.2 micrometers to 1.2 micrometers and can reach up to 3 micrometers in some cases [5][6]. Unmyelinated C tactile fibers are slowly conducting.