Survey
* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project
Download 3.3 Cell Membrane - Warren County Schools
Document related concepts
no text concepts found
Transcript
3.3 Cell Membrane KEY CONCEPT The cell membrane is a barrier that separates a cell from the external environment. 3.3 Cell Membrane ! Cell membranes are composed of two phospholipid layers. 3.3 Cell Membrane ! Cell membranes are composed of two phospholipid layers. • The cell membrane has two major functions. cell membrane 3.3 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 3.3 Cell Membrane ! Cell membranes are composed of two phospholipid layers. • The cell membrane has four major functions. – forms a boundary between inside and outside of the cell – controls passage of materials – cell to cell recognition – anchor site for cytoskeleton cell membrane inside cell outside cell 3.3 Cell Membrane ! Cell membranes are composed of two phospholipid layers. 3.3 Cell Membrane ! Cell membranes are composed of two phospholipid layers. • The cell membrane is made of a phospholipid bilayer. cell membrane 3.3 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 3.3 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 carbohydrate chain cholesterol protein protein channel protein 3.3 Cell Membrane ! Cell membranes are composed of two phospholipid layers. 3.3 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. 3.3 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. 3.3 Cell Membrane ! Chemical signals are transmitted across the cell membrane. • Receptors bind with ligands and change shape. • There are two types of receptors. 3.3 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 3.3 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
Related documents