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The principal components of the plasma membrane are lipids (phospholipids and cholesterol), proteins, and carbohydrate groups that are attached to some of the lipids and proteins. A phospholipid is a lipid made of glycerol, two fatty acid tails, and a phosphate-linked head group.
Structure and function of the plasma membrane and cytoplasm of cells. Also covers the phospholipid bilayer and microvilli.
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Unit 1 Intro to biology. Unit 2 Water, acids, and bases. Unit 3 Macromolecules. Unit 4 Elements of life. Unit 5 Energy and enzymes. Unit 6 Structure of a cell. Unit 7 More about cells. Unit 8 Membranes and transport. Unit 9 More about membranes.
Course: AP®︎/College Biology > Unit 2. Quiz 1. Quiz 1 Cell structure and function. Science>.
Lesson 1: Cell membrane overview. Cell membrane questions. Cell membrane introduction. Phospholipid structure. Cell membrane overview and fluid mosaic model. Cell membrane proteins.
Exocytosis is a form of bulk transport during which large numbers of molecules are transported out of the cell. In exocytosis, a vesicle (a small, membrane-bound compartment) containing the molecules to be released fuses with the cell membrane, and the contents of the vesicle are expelled.
Review your understanding of cell parts and functions in this free article aligned to NGSS standards.
Learn about cell-cell junctions and their role in cell communication and the cell cycle.
The sodium-potassium pump is a trans-membrane protein that helps establish the resting membrane potential of cells, particularly neurons. In a process that requires ATP, the pump moves three sodium ions out of the cell for every two potassium ions it brings in.