IB Biology Topic B2.1.15 Sodium–potassium Pumps as an Example of Exchange Transporters Revision Notes (HL)

IB Biology Topic B2.1.15 Sodium–potassium Pumps as an Example of Exchange Transporters Revision Notes (HL) | RevisionDojo

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The Sodium-Potassium Pump Moves Ions Against Their Gradients

To transmit nerve impulses, neurons rely on concentration gradients of sodium (Na⁺) and potassium (K⁺) ions across their membranes.
These gradients are maintained by the sodium-potassium pump, an active transport protein that moves ions against their gradients using ATP.

The Six Steps of the Pump Cycle

Na⁺ binding
1. The pump is open to the inside of the cell.
2. Three Na⁺ ions bind to specific sites inside the cell.
ATP phosphorylation
1. ATP transfers a phosphate group to the pump.
2. This causes a conformational change that closes the pump to the inside.

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The Sodium-Potassium Pump Moves Ions Against Their Gradients

To transmit nerve impulses, neurons rely on concentration gradients of sodium (Na⁺) and potassium (K⁺) ions across their membranes.
These gradients are maintained by the sodium-potassium pump, an active transport protein that moves ions against their gradients using ATP.

The Six Steps of the Pump Cycle

Na⁺ binding
1. The pump is open to the inside of the cell.
2. Three Na⁺ ions bind to specific sites inside the cell.
ATP phosphorylation
1. ATP transfers a phosphate group to the pump.
2. This causes a conformational change that closes the pump to the inside.

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

Note

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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 B2.1.15: Sodium–potassium Pumps as an Example of Exchange Transporters Notes

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

The Sodium-Potassium Pump Moves Ions Against Their Gradients

The Six Steps of the Pump Cycle

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The Sodium-Potassium Pump Moves Ions Against Their Gradients

The Six Steps of the Pump Cycle

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