An Action Potential

question 66

Multiple Choice

An action potential

• A) occurs when the local potential reaches threshold level.
• B) is not propagated.
• C) has no repolarization phase.
• D) is an example of negative feedback.
• E) can be of varying strengths depending on strength of the stimulus.

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Definitions:

Valence

The combining capacity of an element or particle, often determined by the number of electrons that an atom can share, gain, or lose.

Formal Charge

A concept in chemistry that represents the charge assigned to an atom in a molecule, assuming that electrons in all chemical bonds are shared equally between atoms, irrespective of electronegativity.

Nitrogen Atoms

Atoms that have five electrons in their outer shell and are essential components of amino acids, proteins, and nucleic acids.

Non-Zero Formal Charges

The scenario in which atoms within a molecule have a formal charge other than zero, indicating an unequal distribution of electrons.