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Borek Physiology Ch3 Lec5
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13
Anatomy
Undergraduate 1
01/24/2012

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Term
Examples of nongated, ligand gated ion channels, and definition of voltage-gated
Definition
K+ slow leak, neurotransmitter gated Na+ channel; VG opens when there is a significant change in ion concentration, and therefore intramembraneous voltage
Term
carrier protein
Definition
binds transportee, changes shape, allows transportee through membrane passively, and returns to original shape
Term
3 types of carrier proteins
Definition
uniporters, symporters (Na+ & Glu), antiporters
Term
ligand gated
Definition
ligand binds and opens channel: DOES NOT ENTER THROUGH CHANNEL
Term
secondary active transport
Definition
uses a combination of active transport (ATP use) and passive transport (down concentration gradient). i.e. Na+ & Glu symport: Na is actively put out, but brings Glu in passivley
Term
edema
Definition
physiological complication caused by water osmotically entering the interstitial fluid due to its raised salt content (high solute concentration)
Term
osmotic pressure
Definition
force required to PREVENT water from entering a membrane via osmosis
Term
iso, hyper, and hypoosmotic
Definition
same, higher, and lower osmotic pressure on one side of a membrane compared to the other
Term
iso, hyper, and hypotonic
Definition
same, higher, and lower concentration of solute on one side of a membrane compared to the other
Term
crenation
Definition
shrinkage of a cell due to water leaving it osmotically
Term
hemolysis
Definition
bursting of a blood cell due to water rapidly entering it osmotically
Term
saturation (think transport)
Definition
when the available transport proteins for a particular ligand are being used to their maximum capacity
Term
active transport example
Definition
Na+ & K+ antiport
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