Study BIOL 472 Topic 2 Flash Cards

Pile Management Card
BIOL 472 Topic 2

ouabain

-blocks the Na+/K+-ATPase

tetrodotoxin

-blocks Na+ channels
-can't produce AP
-cardiac respiratory failure

excitiability

-1/chronaxie-highly excitable tissue will have:

-low reobase
-short chronaxie

chronaxie

-duration (msec) which stimulates 2x reobase needs to produce response
-useful for expressing relative excitibilities

utilization time

-time necessary to produce a reobase repsonse

reobase

-minimum intensity (mV) that still produces a response

secondary active transport

-moves down [] gradient w/ another molecule

primary active transport

-needs ATP

brain ischemia

-condition where the brain or parts of the brain do not receive enough blood flow to maintain normal neurological function

facilitated diffusion

-membrane carrier molecule
-process can be saturated

isotonic

300 mOsm for blood
0.3Osm glucose
0.15Osm NaCl

osmolality

-osmol/L
-NaCl dissociates

molality

1mol/L

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