Does the all-or-none law apply to dendrites? Why or why not?...

Name: Problem 14, Chapter 1: Biological Psychology
Uploaded: 2020-10-07T13:28:21-08:00
Duration: 22 s
Channel: Joanna Quigley
Description: Does the all-or-none law apply to dendrites? Why or why not?

Labs

Want to see this concept in action?

NEW

Explore this concept interactively to see how it behaves as you change inputs.

View Labs

Key Concepts

Dendrites

Dendrites are the branched extensions of a neuron that primarily function to receive and integrate synaptic inputs from other neurons. They typically do not generate action potentials but instead exhibit graded potentials, which vary in amplitude and decrease with distance from their point of origin.

Graded Potentials

Graded potentials are depolarizations or hyperpolarizations occurring in the dendrites and cell body of a neuron that are proportional to the strength of the stimulus. Unlike the all-or-none action potentials, these potentials can summate spatially and temporally and exhibit a decremental spread, meaning they reduce in amplitude as they travel.

All-or-None Law

The all-or-none law is a fundamental principle in neurophysiology that states that once the threshold for an action potential is reached, the neuron fires a complete and stereotyped electrical impulse, regardless of the strength of the stimulus, as long as it surpasses the threshold. This binary response mechanism ensures consistent signal propagation along an axon once initiated.

Transcript

Please give Ace some feedback