Membrane transport Flashcards
It refers to the movement of
particles across or through a
membranous barrier
Membrane transport
what are the materials being transported by the cell
membrane?
Small, hydrophobic molecules
Small and large uncharged polar molecules
Ions
Determine the permeability of the materials transported:
Small, hydrophobic molecules : ____
Permeable
Determine the permeability of the materials transported:
Small uncharged polar molecules: ____
Mostly permeable
Determine the permeability of the materials transported:
Large uncharged polar molecules: ___
Mostly impermeable
Determine the permeability of the materials transported:
Ions: ___
Completely impermeable
what are the factors that can affect membrane
transport?
Membrane permeability
Size and charge of solute
Transmembrane solute concentration
What are the two types of membrane transport?
Passive and Active
It does not require the use of energy (ATP)
From high to low concentration
Passive transport
What are the 3 types of passive transport?
Simple diffusion
Osmosis
Facilitated diffusion
It is a type of passive transport that solute molecules pass
through the membrane from a
region of high
concentration to a region
of low concentration.
Simple diffusion
It is a diffusion of solvent
molecules through a
semi-permeable membrane from
an area of low solute
concentration to an area of high
solute concentration
Osmosis
3 types of solution?
Hypotonic
Isotonic
Hypertonic
Movement of molecules through a semi-permeable membrane from an
area of high concentration to an area of low concentration
with the aid of a transport molecule
Facilitated diffusion
3 types of facillitated diffusion?
Channel
Gated channel
Carrier
It is a membrane protein that forms
pores or channels as the
passageway for ions (charged
particles) to cross the
membrane.
Channel protein
Aquaporins is an example of what protein?
Channel protein
It is a type of facilitated diffusion that its membraneprotein that opens a gate allowing the molecules to
pass through the membrane. It can be opened or closed
in response to stimuli
Gated channel protein
It carry ions
or molecules across the
membrane by undergoing a conformational change
upon binding
Carrier protein
It requires the use of energy (ATP). Low concentration to high concentration
Active transport
Membrane protein
transporters (ion
pumps, ion channels,
ATPases). Its example is sodium-potassium pump
Primary active transport
Uses potential energy often from electrochemical potential
difference as ions are pumped in and out of the cell.
Secondary active transport
Symporters or also known as ___?
couple transport or cotransport
Symporters move in one direction, meanwhile antiporters move in ___?
Two directions / opposite directions
It is the movement
of Large
materials into or
out of the cells way
of vesicles
Bulk transport
It is a type of cell process that captures the substances from the outside, engulfing it or bringing it within the cell
Endocytosis
It is a type of cell process that releases the substance or transport the particles from inside to outside
Exocytosis
