Chapter 5A. The Movement of Substances Across cell membranes Learning Obiectives 1. Principles of membrane transport 2. Passive transport and active transport; 3. Two main classes of membrane transport proteins Carriers and Channels
Molecular switches in the cell: fibronectin as a mechanical switch (vogel, 2002) Fibronectin is an adhesion protein secreted by cells and assembled into fibrils to support adhesion and migration Composed of\ of fibronectin repeats Fnl, Fnll, and Fnlll connected by short linkers of varying flexibility One particular Fnlll repeat, Fnlll10
Chapter 3 Techniques in Cell Biology Preparatory observe put forward theoretics Design control tests Refer to knowledge Collect data Explain results Devise conclusion
The plasma membrane has a dual responsibility as a selective ely permeable barrier and transductor. The plasma membrane regulares the traffic of molecules into and out of the cell. Gases and small hydrophobic molecules by passive diffusion transport; Ions, sugars, amino acids, and sometimes water must be transported by a group of integral membrane proteins including
Chapter 11 Cell proliferation and its regulation Significance: 1. For the growth and development of a multicellular organism, and for the generation of offspring; 2. Produce new organisms in unicellular species; 3. Renew the aging, apoptotic cells, and damaged tissue;
present on the B-cell membrane and secreted by plasma cells. Membrane-bound antibody con- fers antigenic specificity on B cells; antigen-specific prolifer- ation of B-cell clones is elicted by the interaction of membrane antibody with antigen Secreted antibodies ci culate in the blood, where they serve as the effectors of hu- moral immunity by searching out and neutralizing antigens or marking them for elimination. All antibodies share struc
