PATHOLOGY

PATHOLOGY MCQ

NERVOUS SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Used when an action potential jumps across myelin from one node of Ranvier to the next
A
saltatory propagation
B
continuous propagation
C
Either A or B
D
None of the above
Explanation: 

Detailed explanation-1: -Saltatory conduction is a form of nerve impulse conduction in which the impulse jumps from one Ranvier’s node to the next, rather than traveling the entire length of the nerve fibre. It is the propagation of action potentials along myelinated axons from one node of Ranvier to the next.

Detailed explanation-2: -Saltatory conduction is a type of nerve impulse conduction in which the nerve impulse jumps from one node of Ranvier to the next. It occurs along the myelinated neuron. Saltatory conduction is a form of fast nerve impulse conduction where the impulse may jump between nodes.

Detailed explanation-3: -Saltatory conduction describes how action potentials propagate along a myelinated axon by “jumping” from one node of Ranvier to the next, increasing the speed of conduction compared to nonmyelinated axons.

Detailed explanation-4: -Saltatory conduction describes the way an electrical impulse skips from node to node down the full length of an axon, speeding the arrival of the impulse at the nerve terminal in comparison with the slower continuous progression of depolarization spreading down an unmyelinated axon.

There is 1 question to complete.