IB Biology B2.1 Definitions

This page contains our IB Biology definitions for B2.1. By learning each one of these definitions, you will fully cover the content for IB Biology 'Further membranes and transport'.

All Topic 2 Sub-topics (HL)A2.1: Origins of cells A2.2: Cell Structure (HL)A2.2: Further cell structure (HL)A2.3: Viruses B2.1: Membranes And Transport (HL)B2.1: Further membranes and transport B2.2: Organelles & Compartmentalisation (HL)B2.2: Further organelles B2.3: Cell Specialisation (HL)B2.3: Further cell specialisation (HL)C2.1: Chemical signalling C2.2: Neural Signalling (HL)C2.2: Further neural signalling D2.1: Cell Division (HL)D2.1: Cell cycle (HL)D2.2: Gene expression D2.3: Water Potential (HL)D2.3: Further water potential

absorption

The process of taking substances into cells and blood

antiporter

An active transport protein that transports two molecules in opposite directions

endocytosis

Invagination of the plasma membrane around substances to form a vesicle that transports substances into the cell

exocytosis

Release of substances into the extra-cellular matrix through fusion of vesicles with the plasma membrane

voltage-gated channel

A channel whose state is dependent on the axon charge

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