IB Biology Topic C2.2.3 Nerve Impulses as Action Potentials That Are Propagated Along Nerve Fibres Revision Notes (SL/HL)

IB Biology Topic C2.2.3 Nerve Impulses as Action Potentials That Are Propagated Along Nerve Fibres Revision Notes (SL/HL) | RevisionDojo

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A Nerve Impulse Is an Action Potential: a Rapid, All-or-None Reversal of Membrane Potential

A nerve impulse is a rapid electrical signal that travels along a neuron's axon.
The impulse is an action potential, a brief reversal of the membrane potential caused by ions crossing the membrane.

Definition

Action Potential

The action potential is the rapid electrical signal generated when the neuron's membrane potential reaches a threshold.

Note

Action potentials are all-or-none events.
They fire fully only if the stimulus reaches the threshold, otherwise they do not fire at all.

An Action Potential Is Depolarization Followed by Repolarization

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Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

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A Nerve Impulse Is an Action Potential: a Rapid, All-or-None Reversal of Membrane Potential

A nerve impulse is a rapid electrical signal that travels along a neuron's axon.
The impulse is an action potential, a brief reversal of the membrane potential caused by ions crossing the membrane.

Definition

Action Potential

The action potential is the rapid electrical signal generated when the neuron's membrane potential reaches a threshold.

Note

Action potentials are all-or-none events.
They fire fully only if the stimulus reaches the threshold, otherwise they do not fire at all.

An Action Potential Is Depolarization Followed by Repolarization

Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Note

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

IB Biology Topic C2.2.3: Nerve Impulses as Action Potentials That Are Propagated Along Nerve Fibres Notes

A Nerve Impulse Is an Action Potential: a Rapid, All-or-None Reversal of Membrane Potential

An Action Potential Is Depolarization Followed by Repolarization

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account

A Nerve Impulse Is an Action Potential: a Rapid, All-or-None Reversal of Membrane Potential

An Action Potential Is Depolarization Followed by Repolarization

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics