When an Axon Membrane Reaches Its Threshold for an Action

question 77

Multiple Choice

When an axon membrane reaches its threshold for an action potential,what type of ions enter from outside to inside?​

• A)Sodium
• B)​Calcium
• C)​Potassium
• D)​Chloride

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Definitions:

Innate

Traits, abilities, or behaviors that are inherent and present at birth, not acquired through learning.

Key Stimulus

A specific environmental cue that triggers a fixed action pattern in an animal.

Fixed Action Pattern

A sequence of unlearned acts directly linked to a specific stimulus, which is virtually inevitable and once begun, is carried to completion.

Innate Action Pattern

A pre-programmed response that is triggered by specific environmental stimuli, characteristic of a particular species.