click below
click below
Normal Size Small Size show me how
Neuroscience Ch3
Question | Answer |
---|---|
Polar covalent bonds | a molecule which, while electrically neutral overall, has some atoms more or less attracted to the shared electron (covalent), and therefore the molecule has an uneven distribution of charge. H2O! |
Ionic bond | bond between two molecules with net electrical charges (molecules called ions) that are opposite |
Cations | ions w/ net positive charge |
Anions | ions w/ net neg charge |
Phospholipids | hydrophobic parts of the membrane which form barrier btwn h2O and h2Osoluble (Na+ K+ Ca2+, Cl-). Are nonpolar chains of carbn bonded w/hydrgn. but also: has a polar phosphate group (phosphate bonded to 3 oxys) at one end.polar head and nonpolar tail! |
Peptide bonds | chain of amino acids. These chains form into, not just the “primary structure” of a simple chain, but spirals (“secondary”), globular shapes (“tertiary”) via bending/folding. AND tertiary units can bond with each other (“quaternary”) |
Ion channels | if you get a quaternary structure of amino acids, it might form a “pore” with a hydrophobic (nonpolar) outsides and hydrophilic (polar) insides. It might be selective due to the size of pore and a-acid makeup, and thus only let e.g., Na+ through. |
Sodium-potassium pump | if equilibrium btwn inside and outside of neuron were reached, then neuron couldnt have its neg resting potential. This pump breaks down ATP when there’s Na+ on the inside, which gives it the energy to push out Na+ and pull in K+. |