IB Biology Topic C2.2.7 Generation of an Excitatory Postsynaptic Potential Revision Notes (SL/HL)

IB Biology Topic C2.2.7 Generation of an Excitatory Postsynaptic Potential Revision Notes (SL/HL) | RevisionDojo

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An EPSP is a local depolarization of the postsynaptic membrane caused by neurotransmitter binding

An excitatory postsynaptic potential (EPSP) is a small depolarization that makes the postsynaptic neuron more likely to fire.

It begins when neurotransmitter, already released from the presynaptic terminal (C2.2.6), reaches the postsynaptic membrane.

Neurotransmitter binds ligand-gated channels, letting sodium ions into the postsynaptic cell

The neurotransmitter diffuses across the cleft and binds receptors on the postsynaptic membrane.
These receptors are ligand-gated ion channels, which open only when the neurotransmitter binds.
The open channels let sodium ions (Na⁺) flow into the postsynaptic cell.

Sodium influx depolarizes the membrane, and this depolarization is the EPSP

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An EPSP is a local depolarization of the postsynaptic membrane caused by neurotransmitter binding

An excitatory postsynaptic potential (EPSP) is a small depolarization that makes the postsynaptic neuron more likely to fire.

It begins when neurotransmitter, already released from the presynaptic terminal (C2.2.6), reaches the postsynaptic membrane.

Neurotransmitter binds ligand-gated channels, letting sodium ions into the postsynaptic cell

The neurotransmitter diffuses across the cleft and binds receptors on the postsynaptic membrane.
These receptors are ligand-gated ion channels, which open only when the neurotransmitter binds.
The open channels let sodium ions (Na⁺) flow into the postsynaptic cell.

Sodium influx depolarizes the membrane, and this depolarization is the EPSP

Definition

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(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

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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.

Excepteur sint occaecat cupidatat non proident

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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 - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

IB Biology Topic C2.2.7: Generation of an Excitatory Postsynaptic Potential Notes

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

An EPSP is a local depolarization of the postsynaptic membrane caused by neurotransmitter binding

Neurotransmitter binds ligand-gated channels, letting sodium ions into the postsynaptic cell

Sodium influx depolarizes the membrane, and this depolarization is the EPSP

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

An EPSP is a local depolarization of the postsynaptic membrane caused by neurotransmitter binding

Neurotransmitter binds ligand-gated channels, letting sodium ions into the postsynaptic cell

Sodium influx depolarizes the membrane, and this depolarization is the EPSP

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