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Topic 2.4:Membranes

2.4 Membranes

2.4.1

Draw and label a diagram to show the structure of membranes.

2.4.2

Explain how the hydrophobic and hydrophilic properties of phospholipids help to maintain the structure of cell membranes.

2.4.3

List the functions of membrane proteins.

2.4.4

Define diffusion and osmosis.

2.4.5

Explain passive transport across membranes by simple diffusion and facilitated diffusion.

2.4.6

Explain the role of protein pumps and ATP in active transport across membranes.

2.4.7

Explain how vesicles are used to transport materials within a cell between the rough endoplasmic reticulum, Golgi apparatus and plasma membrane.

2.4.8

Describe how the fluidity of the membrane allows it to change shape, break and re-form during endocytosis and exocytosis.

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