* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Cell Membrane - Seekonk High School
Survey
Document related concepts
Biochemical switches in the cell cycle wikipedia , lookup
Protein moonlighting wikipedia , lookup
Cell culture wikipedia , lookup
Cell nucleus wikipedia , lookup
Cellular differentiation wikipedia , lookup
Cell growth wikipedia , lookup
Organ-on-a-chip wikipedia , lookup
Extracellular matrix wikipedia , lookup
Theories of general anaesthetic action wikipedia , lookup
Cytokinesis wikipedia , lookup
Intrinsically disordered proteins wikipedia , lookup
Signal transduction wikipedia , lookup
Cell membrane wikipedia , lookup
Lipid bilayer wikipedia , lookup
Model lipid bilayer wikipedia , lookup
Transcript
Homeostasis Cells must maintain homeostasis in order to live One way is by controlling the movement of water through the cell membrane Cell Membrane A fluid sea of lipids in which proteins float Allows only some materials to enter the cell Phospholipid Specialized lipid made of a phosphate head and two fatty acid tails Lipid Bilayer Phospholipids form a lipid bilayer One polar head faces the cytoplasm Other polar head faces outside Lipid Bilayer Barrier The phospholipids form a barrier through which only small, nonpolar substances can pass. Proteins Nonpolar parts are attracted to inside of lipid bilayer Polar parts are attracted to outside Types of Proteins Cell-surface markers – identify each type of cell by the kind of sugars Attached to the surface by glycoproteins Types of Proteins cont. Receptor Proteins – enable the cell to sense its surroundings by binding to certain substances outside the cell Causes changes in cell Types of Proteins cont. Enzymes – Proteins in the cell membrane help with important biochemical reactions in the cell Types of Proteins cont. Transport Proteins – Many substances the cell needs cannot pass through the lipid bilayer Proteins aid the movement of these substances in and out of the cell