- Slides: 13
Bio-Physics (4 th level Entomology) 2020 PRESENTED BY DR/Mostafa Ismail Omar Physics Dept.
Biophysics Object: The object of this Corse is to introduce the student of physics, biology, chemistry to the possibilities that exist for applying his skills in the physical sciences to understanding of the principles and problems of the life sciences.
Content Chapter 1: Cell and biological molecules. The concept of biophysical system and the living cell structure.
Content Chapter 2: Transfer of materials through living cell membrane. Discuss the transfer of materials across living cell membrane and how these materials are transported either passively or actively.
Content Chapter 3: Electricity within the body. Explain the passive and active electrical properties of living cells and tissues, which are electric resistance and capacitance in addition to the membrane potential or resting potential and electrodes which use in records.
Content Chapter 4: Potentials at the surface of the body. presents the electrode types and properties. Chapter 5: Mechanical properties of living tissues. the elasticity, viscosity and surface tension Chapter 6: Elctrical signals; EMG, ECG, EEG and EKG, ERG
Chapter 1: Cell and biological molecules. 1 -2. Cell as the living unit of the body: *Cellula or small room (Robert Hooke). *Some organisms are unicellular (bacteria) other are multicellular (human). *Cell size (10 um), cell mass(1 nano gram)
Chapter 1: Cell and biological molecules 1 -2. Cell as the living unit of the body: *Cell theory (1839 -Schleiden and Schwann): -All organisms are composed of one or more cells. -All cells come from preexisting cells. -All cells contain the hereditary information necessary for regulating cell functions and for transmitting information to the next generation of cells.
Chapter 1: Cell and biological molecules 1 -2. Cell as the living unit of the body: Although the many cells of the body often differ markedly from each other, all of them have certain basic characteristics that are alike. (SHOWING HOW ? ) In all cells: 3 - Almost all cells also have the ability to reproduce, and when cells of a particular type are destroyed from one cause or another, the remaining cells of this type often generate new cells until the supply is replenished.
Chapter 1: Cell and biological molecules Definition of cell membrane: *It is a semipermeable lipid bilayer common to all living cells. (plasma membrane-plasmalemma). * physically it separates the intracellular components from the extracellular environment.
Chapter 1: Cell and biological molecules. 1 -Lipids Membrane structure 3 Cytoskeleton. 2 -Proteins.
Chapter 1: Cell and biological molecules. The functions of the cell membrane : 1 -It controls what enters and exist the cell as it is selectively permeable. 2 -Anchoring of the cytoskeleton to provide shape to the cell. 3 -Attaching to the extracellular matrix to help group cells together in the formation of tissues.
Chapter 1: Cell and biological molecules. The functions of the cell membrane : 4 -Transportation of particles by way of ion pumps, ion channels, and carrier proteins. 5 -Containing receptors that allow chemical messages to pass between cells and systems. 6 -Participation in enzyme activity important in such things as metabolism and immunity.