Electro Physiology Flashcards
if the water concentration of a solution is high, then what does that mean about the osmolarity?
osmolarity is likely low…so water will move out
if water conc of solution is low…then what does that mean about the osmolarity?
the lower the water the higher the osmolarity…so water will move in
if you put a cell with 300 mOsm inside a solution with 400 mOsm…what direction will the water move?
outside of the 300 mOsm cell…shrinks the cell
if you put a 300 mOsm inside a solution of 200 mOsm..what will water do?
water will move inside of the cell and make it swell
what is the nernst equation used for?
calculating membrane potential of a specific ion
give the nernst equation
= (60/Z) x log(Xout/Xin) where Z is charge and X is ion conc
results of nernst equation if you have a positive ion with higher conc inside of cell
will lead to negative membrane potential
results of nernst if you have a positive ion with higher conc on outside of cell
will lead to positive membrane potential
membran potential of calcium
+122
membrane potential of sodium
+59
membrane potential of potassium
-85
membrane potential of chloride
-82 to -46
what allows electrical synapses to occur?
gap junctions
what are gap junctions made of?
connexons
what is used to link two cells in a chemical synapse?
glycoalyx
