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TRANSPORT ACROSS CELL MEMBRANES
TYPES OF TRANSPORT ACROSS MEMBRANES
ACTIVE TRANSPORT
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Created by
Jasmine Singh
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WHAT IS ACTIVE TRANSPORT?
movement
of a
substance
from an area of
lower concentration
to an area of
higher concentration
using
metabolic energy
and a
carrier protein
PROCESS OF ACTIVE TRANSPORT?
Transport
through
carrier proteins
spanning
the
cell membrane
Molecule
binds
to a
receptor complementary
in
shape
on
protein
ATP
binds
to
carrier protein
from
inside
of
cell
ATP
hydrolysed
to
ADP
+
Pi
Causes
carrier protein
to
change shape
Carrier protein
releases molecule
to
other side
Phosphate ion released
Protein
returns to
original shape
