EXSS 256 Membrane Transport 2026 – Study Guide, Key Concepts & Exam Review

EXSS,./256:,./Membrane,./Transport


T/F:,./Plasma,./membranes,./are,./selectively,./permeable,./-,./correct,./answer,./✔
✔ True


T/F:,./The,./lipid,./bilayer,./is,./always,./permeable,./to,./large,,./polar,,./charged,./mo
lecules,./-,./correct,./answer,./✔ ✔ False

-
The,./lipid,./bilayer,./is,./always,./permeable,./to,./small,,./nonpolar,,./uncharged,./
,./


molecules
-,./Is,./impermeable,./to,./ions,./or,./charged,./molecules


T/F:,./Transmembrane,./proteins,./that,./act,./as,./channels,./or,./transporters,./decre
ase,./the,./permeability,./of,./the,./membrane,./-,./correct,./answer,./✔ ✔ False

-
,./ Transmembrane,./proteins,./that,./act,./as,./transporters,./increase,./permeability


T/F:,./Macromolecules,./are,./only,./able,./to,./pass,./through,./the,./plasma,./membr
ane,./by,./vesicular,./transport,./-,./correct,./answer,./✔ ✔ True



What,./is,./the,./concentration,./gradient?,./-,./correct,./answer,./✔ ✔ -
,./Difference,./in,./the,./concentration,./[X],,./of,./a,./chemical,./between,./one,./side,./o


f,./the,./plasma,./membrane,./and,./the,./other

, What,./is,./the,./electrical,./gradient?,./-,./correct,./answer,./✔ ✔ -
,./Difference,./in,./concentration,./of,./ions,./between,./one,./side,./of,./the,./plasma,./ m


embrane,./and,./the,./other
-,./Sets,./up,./an,./electrical,./gradient,./a.k.a.,./membrane,./potential
-
Electrical,./and,./concentration,./gradients,./together,./make,./up,./the,./electroche
,./


mical,./gradient


The,./two,./types,./of,./transport,./processes,./that,./move,./substances,./across,./the,./
cell,./membrane,./are:,./-,./correct,./answer,./✔ ✔ -,./Passive,./Processes

-,./Active,./Processes


What,./are,./the,./passive,./processes?,./-,./correct,./answer,./✔ ✔ -
,./Simple,./Diffusion



-,./Facilitated,./Diffusion
-,./Osmosis


What,./is,./simple,./diffusion?,./-,./correct,./answer,./✔ ✔ -
,./Random,./mixing,./of,./particles,./in,./a,./solution,./as,./a,./result,./of,./the,./kinetic,./en


ergy,./of,./the,./particles
-,./Both,./the,./solvent,./and,./solute,./can,./diffuse
-,./Movement,./from,./area,./of,./[high],./to,./[low]