Question

What does not accurately describe the events involved in the propagation of an action potential?

Answer 1

The events involved in the propagation of an action potential are accurately described as the action potential moving down the axon, jumping between Nodes of Ranvier in myelinated axons, and being an all-or-none event with a peak voltage of +30 mV.

Step-by-step explanation:

The events involved in the propagation of an action potential are accurately described as follows:

1. The action potential is a positively charged electrical spike that moves from the cell body down the axon.
2. The signal moves in a leapfrog fashion between the Nodes of Ranvier, which are natural gaps in the myelin sheath.
3. In unmyelinated axons, the propagation occurs continuously through voltage-gated channels throughout the membrane. In myelinated axons, the propagation is saltatory, jumping from one node to the next.
4. The action potential is an all-or-none event, meaning it either happens or it does not. It reaches a peak voltage of +30 mV and is not bigger with a stronger stimulus.
5. During the refractory period, another action potential cannot be initiated until the membrane reaches its resting conformation.