Unit 3 – Lecture 6. Cellular Transport Cellular Transport – the movement of substances across...
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Transcript of Unit 3 – Lecture 6. Cellular Transport Cellular Transport – the movement of substances across...
Unit 3 – Lecture 6
Cellular TransportCellular Transport – the movement of
substances across the membranes of the cell.two kinds of cellular transport:
Cellular Transport – cont’dPassive Transport
substances move WITH the gradient [from an area of high concentration to an area of low concentration]
does not require Energyworks to reach dynamic equilibrium
includes:diffusionosmosisfacilitated diffusion w/ protein channels
Cellular Transport – cont’dActive Transport –
substances move AGAINST the gradient [from an area of low concentration to an area of high concentration]
requires Energyworks to upset equilibrium
Cellular Transport – cont’dActive Transport –
includes:ion protein pumpstransport vescicles [endo/exo cytosis]parts of the Electron Transport Chain
we will discuss the ETC for the next part of the cells unit
ETC makes ATP for the cell
Ion Protein Pumps
Endo- & Exo- cytosis
Endo- & Exo- cytosis
ATPATP = Adenosine-Tri-Phosphate
the cell’s source of energyadenosine = a nucleotidetri- = threephosphate = a phosphate
[phosphorous & oxygen]
ATP – cont’dhaving 3 phosphates on a molecule makes
the ATPs very electronegative like charges repel
it will take a lot of energy to make the bond stay [like packing stuff into a closet and having to push hard to keep the door closed].
ATP – cont’dWhen the bond is broken
[ATP ADP + P], the energy stored in the bond is released and can be used to fuel the cell’s processes. ADP = adenosine
DI-phosphate [“di-” = two]
Making ATPATP is made using the ATP Synthase
enzyme that makes ATP from ADP+P
“synth” – as in synthesize = to make“ase” = an enzyme