* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download cell membrane
Survey
Document related concepts
Cytoplasmic streaming wikipedia , lookup
Model lipid bilayer wikipedia , lookup
Biochemical switches in the cell cycle wikipedia , lookup
Lipid bilayer wikipedia , lookup
Membrane potential wikipedia , lookup
SNARE (protein) wikipedia , lookup
Cell nucleus wikipedia , lookup
Cellular differentiation wikipedia , lookup
Extracellular matrix wikipedia , lookup
Cell encapsulation wikipedia , lookup
Cell culture wikipedia , lookup
Cell growth wikipedia , lookup
Organ-on-a-chip wikipedia , lookup
Signal transduction wikipedia , lookup
Cytokinesis wikipedia , lookup
Cell membrane wikipedia , lookup
Transcript
The Cell Membrane Cell membranes are composed of two phospholipid layers. The Cell Membrane Cell membranes are composed of two phospholipid layers. The cell membrane has two major functions. The Cell Membrane Cell membranes are composed of two phospholipid layers. The cell membrane has two major functions. forms a boundary between inside and outside of the cell cell membrane inside cell outside cell The Cell Membrane Cell membranes are composed of two phospholipid layers. The cell membrane has two major functions. forms a boundary between inside and outside of the cell controls passage of materials cell membrane inside cell outside cell The Cell Membrane Cell membranes are composed of two phospholipid layers. The Cell Membrane Cell membranes are composed of two phospholipid layers. The cell membrane is made of a phospholipid bilayer. cell membrane The Cell Membrane Cell membranes are composed of two phospholipid layers. The cell membrane is made of a phospholipid bilayer. There are other molecules embedded in the membrane. cell membrane carbohydrate chain cholesterol protein protein channel protein The Cell Membrane Cell membranes are composed of two phospholipid layers. The cell membrane is made of a phospholipid bilayer. There are other molecules embedded in the membrane. The fluid mosaic model describes the membrane. cell membrane protein carbohydrate chain cholesterol protein channel protein The Cell Membrane Cell membranes are composed of two phospholipid layers. The Cell Membrane Cell membranes are composed of two phospholipid layers. The cell membrane is selectively permeable. Some molecules can cross the membrane while others cannot. The Cell Membrane Cell membranes are composed of two phospholipid layers. The cell membrane is selectively permeable. Some molecules can cross the membrane while others cannot. The Cell Membrane The cell membrane has proteins embedded in it. There are four main types of membrane proteins. Cell-surface marker Enzymes Transport protein Receptor protein Proteins have polar and nonpolar sections. The polar sections of the protein attach to the polar heads. The nonpolar sections of the protein attach to the nonpolar tails. The Cell Membrane Cell-surface markers identify what type of cell it is. Many cell-surface markers are glycoproteins. Glycoproteins are a combination of a protein with a polysaccharide attached. Auto-immune diseases such as lupus are caused by the body misidentifying the glycoprotein on a cell. This causes the white blood cells to attack the body’s own cells. The Cell Membrane Enzymes are also embedded in the cell membrane. These membranes speed up chemical reaction within the cell. Transport proteins help substances move across the cell membrane. Some molecules are too big to move between the lipid bilayer, and therefore have to be allowed into a cell through the transport protein. Some transport proteins require ATP to open. The Cell Membrane Chemical signals are transmitted across the cell membrane. Receptors bind with ligands and change shape. There are two types of receptors. The Cell Membrane Chemical signals are transmitted across the cell membrane. Receptors bind with ligands and change shape. There are two types of receptors. intracellular receptor The Cell Membrane Chemical signals are transmitted across the cell membrane. Receptors bind with ligands and change shape. There are two types of receptors. intracellular receptor membrane receptor