IB Biology Topic B2.1.8 Selectivity in Membrane Permeability Revision Notes (SL/HL)

IB Biology Topic B2.1.8 Selectivity in Membrane Permeability Revision Notes (SL/HL) | RevisionDojo

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Selective Permeability: Cells Choose What Crosses the Membrane

The cell membrane maintains homeostasis by controlling what moves into and out of the cell.
Its selective permeability lets certain particles pass while blocking others, keeping the inside balanced.

Selectively Permeable Membranes Are More Precise Than Semi-Permeable Ones

Semi-permeable membranes
1. They let small solutes through and are freely permeable to water.
2. This describes artificial membranes such as those used in dialysis.
3. They cannot control which specific substances cross.
Selectively permeable membranes

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Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
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Selective Permeability: Cells Choose What Crosses the Membrane

The cell membrane maintains homeostasis by controlling what moves into and out of the cell.
Its selective permeability lets certain particles pass while blocking others, keeping the inside balanced.

Selectively Permeable Membranes Are More Precise Than Semi-Permeable Ones

Semi-permeable membranes
1. They let small solutes through and are freely permeable to water.
2. This describes artificial membranes such as those used in dialysis.
3. They cannot control which specific substances cross.
Selectively permeable membranes

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.

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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 B2.1.8: Selectivity in Membrane Permeability Notes

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

Selective Permeability: Cells Choose What Crosses the Membrane

Selectively Permeable Membranes Are More Precise Than Semi-Permeable Ones

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

Selective Permeability: Cells Choose What Crosses the Membrane

Selectively Permeable Membranes Are More Precise Than Semi-Permeable Ones

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