NROB60H3 Chapter Notes - Chapter 3: Nernst Equation, Hydrophile, Astrocyte
Document Summary
Cytosol and extracellular fluid: water is the main ingredient with electrically charged ions dissolved in it (there"s are responsible for the resting and action potentials) Water: the most important property is its uneven distribution of electrical charge. Ions and polar molecules are hydrophilic: nonpolar covalent bonds have no chemical interactions with water (will no dissolve) -> even distribution of electrons -> hydrophobic. Channel proteins exposed surface of a protein is chemically heterogeneous. Diffusion ions and molecules in water are in constant motion -> tends to distribute ions evenly throughout the solution there is net movement from regions of high concentration to regions of low concentration. > diffusion: when you add milk to coffee it will disperse around the entire liquid, if you lower the heat, it"ll go slower (adding milk to ice coffee) More current will flow as the difference is increased. Represented by g, measure in siemens (s)
