Physiology - Chemical principles governing bodily function
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14 terms
Terms | Definitions |
|---|---|
 anion | an atom or molecule with a net negative charge due an excess of electrons |
| cation | an atom or molecule with a net positive charge due to less electrons than protons |
| oxyanion | polyatomic/molecular anions (ion of 2 or more atoms) containing oxygen |
| Radical | an ion with unpaired electrons, and is very reactive |
| osmole | amount of a substance that dissolves in solution to form 1 mole of osmotically active particles |
| acid | H+ donator |
| base | H+ receptor |
| pH | H+ concentration pH = ‐log10[H+] |
| buffer solution | a solution which contains a weak acid and its conjugate base and resists drastic changes in pH |
| equilibrium constant | ratio of forward rate constant divided by reverse rate constant |
| Henderson-Hasselbach equation | pH = pKa + log([A-]/[HA]) |
| concentration gradient | water is also a particle, it flow down it's concentration gradient like any other particle |
| Ficks law of diffusion | For a given temperature, diffusion of a substance across a membrane is influenced by a range of factors: concentration gradient , Q= ΔCAβ/√MW(ΔX) ΔC= magnitude or steepness of the concentration gradient A= surface area of the membrane across which diffusion is taking place β= permeability of the membrane to the substance MW= molecular weight of the substance ΔX= distance through which the diffusion takes place (thickness of the membrane) |
| 1st Law of thermodynamics | - Energy is conserved - Energy cannot be created or destroyed, it is simply transformed into another form |
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