Cell signaling can affect virtually every aspect of cell structure and function: Activation of enzyme activity;  Change in cytoskeletal organization;  Change in ion permeability;  Initiation of DNA synthesis;  Activation or repression of gene expression

ne system assume different roles in pro- the host. The effectors of the humoral molecules f cells Big CTL Attacks Little Tumor Cell Effector Responses General Properties of Effector Cells Cytotoxic T Cells Natural Killer Cells Antibody-Dependent- Cell-Mediated- Cytotoxicity Experimental Assessment of Cell-Mediated Cytotoxicity

UNIT CELL PROCESSES Concept of a \Control Volume\ around a Cell Soluble Regulator Cell Matrix

2.4.1 Cell Activities \Packaged\ sequences (cascades) of cell activities/functions with an identifiable beginning and an end 2.4.1.1 Mitosis(Proliferation) Mitosis is a complex of processes leading to the division of a cell such that the two daughter nuclei receive identical complements of the number of chromosomes characteristic of the cells of the species. All cells arise from the division of pre-existing cells. The process of mitosis is divided into four phases:

2.1 Overview of the structure of microbial cells 2.2 Procaryotic cell wall 2.3 Cytoplasmic membrane 2.4 Cellular genetic information 2.5 Cytoplasmic matrix – Ribosome and Inclusions 2.6 Components external to the cell wall 2.7 Bacterial endospores 2.8 Comparison of the prokaryotic and eukaryotic cell

THE CELL WALL Before traversing the plasma membrane(p. m., ions must first cross the cell wall and contact the p. m the bulk flow of soil solution coul theoretically carry inorganic ions into the cell wall and through the apoplastic pathway. The thickness of a cell wall is in the range of 500 to 1000 nm. It is porous

I Review Structure of the Cell Membrane II Transport Through the Cell Membrane Tetrodotoxin (TTX) selectively block the voltage-gated Na+ channel

The nucleus is the biggest and most important organelle of the cell. The presence of the nucleus is the principal feature that distinguishes eukaryotic from prokaryotic cells Almost eukaryotic cells have the nucleus except mature red blood cells of mammals and sieve cells of high plants etc.. By housing the cell's genome, the nucleus serves both as the repository of genetic information and as the control

I. Eukaryotic cell structure/ function and genetics 18.1 Eukaryotic cell 18.2 Respiratory Organelles: Mitochondrion & Hydrogenosome 18.3 Photosynthetic Organelle: Chloroplast叶绿体 18.4 Endosymbiosis: Relationships of Mitochondria and Chloroplasts to Bacteria内共生学说 18.5 Other Organelles and Eukaryotic Cell Structures 18.8 Phylogeny of the Eukarya 18.9 Protozoa 原生生物

3.5 Cytoplasmic membranes: Structure 3.6 Cytoplasmic membranes: Function 3.7 Membrane transport systems 3.8 Cell Wall 3.9 The Outer Membrance of Gram-negative Bacteria