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Motion in Biological Definition

Diffusion

... diffusion is the result of turbulent fluid motion rather than chemical reactions or the ... 2.3 Atomic diffusion 2.4 Brownian motion 2.5 Electron diffusion 2.6 Momentum ... See also Kirkendall effect . Brownian motion ...

Kinetic energy

... , or living force ) is energy possessed by a body by virtue of its motion . The kinetic energy of a body is equal to the amount of work needed to ... specifically refers to the energy associated with the random translational motion of atoms and molecules in some identifiable matter within a system . The ...

Aseptic technique in microbiology

... protection from airborne microbes. The person would start the fire, and move the end of the innoculating loop, in a slow back-and-forth motion , through the top of the blue part of the flame. The person would not allow the loop to touch anything except the specimen itself, until the entire ...

ATPase

... triphosphate (ATP). This enzyme works when a proton moves down the concentration gradient, giving the enzyme a spinning motion. This unique spinning motion bonds ADP and P together to create ATP. ATP synthetase can also function in reverse; that is, use energy released by ATP hydrolysis to pump protons ...

Cytoskeleton

... or " skeleton " contained, as all other organelles , within the cytoplasm . It is a dynamic structure that maintains cell shape, enables some cell motion (using structures such as flagella and cilia ), and plays important roles in both intra-cellular transport (the movement of vesicles and ...

Equilibrium

... change in the amount of each compound . Mechanical equilibrium , also known as static equilibrium , the state of a body at rest or in uniform motion in which the sum of all forces and torques acting on the body equals zero. Physical balance of humans and animals is maintained with the ...

Magnetic resonance imaging

... study connections in the brain. In an isotropic medium (inside a glass of water for example) water molecules naturally move according to Brownian motion . In biological tissues however the diffusion is very often anisotropic . For example a molecule inside the axon of a neuron has a low probability ...

Signal transduction

... release of neurotransmitter from nerve endings, vision in retina cells, proliferation , secretion , cytoskeleton management, cell motion , gene expression and metabolism . The three main pathways that lead to Ca 2+ activation are : G protein regulated pathways ...

Optical spectrum

... radial velocity as small as a few metres per second could be detected - the presence of planets was revealed by their gravitational influence on the motion of the stars analysed. See also Frequency Wavelength Rydberg formula Tetrachromat Trichromat ...

X-ray crystallography

... and often frozen with liquid nitrogen . Freezing crystals both reduces radiation damage incurred during data collection and decreases thermal motion within the crystal. Crystals are placed on a diffractometer , a machine that emits a beam of x-rays. The x-rays diffract off the electrons in the ...
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