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Interference between physics and biology
- 1. Relation between Physics and Biology By-Lovnish Thakur ASU2014010100099 Integrated Biotech-3rd Sem BSBT-213(Bioenergetics;Biophysics)
- 2. Biophysics • Biophysics is an interdisciplinary science using methods of, and theories from, physics to study biological systems
- 3. Application in Biological World
- 4. IN ECOSYSTEM • According to first law (Energy is neither created nor destroyed, bur can be transformed from one state to another) • Energy of sunlight is transformed into energy of food and heat.
- 5. • According to second law, no transfer of energy occurs unless and until it is accompanied by degradation or dissipation of energy from concentrated to dispersed form. • So, the transfer of energy from one organism to another is accompanied by degradation and loss of major part of food energy as heat. • That is the reason that energy flow in ecosystem follows 10 % law.
- 7. Homeostasis & the first law of thermodynamics • Body Temperature • Blood Glucose Metabolism converts food's potential energy to both work and heat energy, which are needed to maintain a proper body temperature and to do physical activities.
- 8. Excitable Membranes • Signal-mediating cells of the nervous system called neurons are special, in that they are able to send signals to one another with velocities. • Resting potential • Driving forces due to the electric field and the concentration gradient are mutually opposed, there will be equilibrium
- 10. In Biomolecules Conformations In folding of Protein forces like -: • Hydrogen Bonds • van der Waals Interactions • Hydrophobic Interactions • Ionic Interaction
- 13. Movement of Organisms • Movement in Bacteria For small sizes of single-cellular organisms such as bacteria it is very difficult to move as compared to the cases of swimming fish and humans. In this case viscosity plays a dominant role So this result in evolution of bacteria with flagella
- 15. Sound Production • Human voice is produced in the larynx, which is a part of the throat. • When air from our lungs passes through the tightened cords a vibration is produced. • This vibration produces vocal sounds. http://www.google.co.in/imgres?imgurl=http://hyperphysics.phy- astr.gsu.edu/hbase/music/imgmus/voc.gif&imgrefurl=http://hyperphysics.phy- astr.gsu.edu/hbase/music/voice.html&h=337&w=300&tbnid=fdFjEYjBAoyVjM:&docid=3vXYJq3HsHQaYM&ei =ZUguVu3yM8PCmAWmnaGQCA&tbm=isch&ved=0CDoQMygXMBdqFQoTCK250MG74MgCFUMhpgodpk4Igg
- 16. Piezoelectricity & Bone Growth • Bone under stress & strain condition develop charge on their surface. • Result in deposition of salt in bone and increase in the size of bone • Electrical signals in amphibians which can naturally regenerate lost limbs, differ from those in mammals, which ordinarily do not regenerate lost limbs.
- 18. Animal & Plants struggles with gravity • Size of single biological cells is inversely proportional to the strength of the gravitational field exerted on the cell. • Gravitropism, or the growth or movement of a plant with respect to gravity • Human immune cells were unable to differentiate into mature cell in the absence of gravity
- 19. Reference • http://education.seattlepi.com/homeostasis-first-law- thermodynamics-5068.html • www.wiley.com › ... › Geology & Geophysics › Geology & Geophysics • www.encyclopedia.com/doc/1G2-3409800064.html • gradestack.com/.../Sound/...Sound-Produced.../14794- 2855-2728-study-.. • www.intechopen.com/.../thermodynamics.../some- applications-of-thermo • file-pdf.hol.es/p/introduction-to-biophysics-rodney.pdf
- 20. THANK YOU