Shared Flashcard Set

Details

ANT 3100: Chapter 3 (PHYS)
Chapter 3
24
Anatomy
Undergraduate 1
09/12/2012

Additional Anatomy Flashcards

 


 

Cards

Term
5 ways to increase movement across membrane
Definition
1) increase gradient
2) increase permeability
3) increase surface area
4) smaller molecules
5) decrease travel distance
Term
selectively permeable
Definition
only certain molecules are able to pass through
Term
4 types of passive transport
Definition
simple diffusion, osmosis, filtration, and facilitated diffusion (DOES NOT REQUIRE ATP)
Term
passive transport involves the movement...
Definition
movement of molecules down a gradient (high to low)
Term
simple diffusion
Definition
movement of lipid soluble molecules across a membrane by squeezing through the lipid bilayer
Term
osmosis
Definition
movement of water across a membrane
Term
osmotic pressure
Definition
pressure that drives the movement of water
Term
normal blood osmolarity
Definition
280 to 300 mOsm/L or mOsm/kg
Term
tonicity
Definition
unitless comparison of osmolarity between two fluids
Term
hypotonic fluid
Definition
lower concentration of solutes; water moves away from a hypotonic fluid
Term
hypertonic fluid
Definition
higher concentration of solutes; water moves toward a hypertonic fluid
Term
isotonic fluid
Definition
equal concentration of solutes inside and outside; no net movement of water
Term
filtration
Definition
movement of fluid across a membrane
Term
hydrostatic pressure
Definition
pressure that drives the movement of fluid
Term
facilitated diffusion
Definition
movement of molecules via transport proteins (channels, carriers)
Term
rate of transporter
Definition
directly proportional to the concentration of molecules
Term
saturation of transporter
Definition
occurs when molecules reach a concentration that overwhelms the transporter
Term
active transport
Definition
movement of molecules across the membrane with the requirement of ATP
Term
primary active transport
Definition
direct use of ATP; transport of molecules across the membrane against a concentration gradient
Term
secondary active transport
Definition
uses ATP indirectly; transport of a molecule against its concentration gradient via the aid of another molecule down its concentration gradient
Term
endocytosis
Definition
movement of substances into cells via vesicles at the cell surface
Term
3 types of endocytosis
Definition
1) phagocytosis
2) pinocytosis
3) receptor mediated endocytosis
Term
exocytosis
Definition
movement of substances out of a cell via vesicles at the cell surface
Term
transcytosis
Definition
process of transporting substances through a cell (combination of receptor mediated endocytosis and exocytosis)
Supporting users have an ad free experience!