1. Unit 3 – Lecture 6

2. Cellular Transport Cellular Transport – the movement of substances across the membranes of the cell. two kinds of cellular transport:

3. Cellular Transport – cont’d Passive Transport substances move WITH the gradient [from an area of high concentration to an area of low concentration] does not require Energy works to reach dynamic equilibrium includes: diffusion osmosis facilitated diffusion w/ protein channels

4. Cellular Transport – cont’d Active Transport – substances move AGAINST the gradient [from an area of low concentration to an area of high concentration] requires Energy works to upset equilibrium

5. Cellular Transport – cont’d Active Transport – includes: ion protein pumps transport 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

6. Ion Protein Pumps

7. Endo- & Exo- cytosis

9. ATP ATP = Adenosine-Tri-Phosphate the cell’s source of energy adenosine = a nucleotide tri- = three phosphate = a phosphate [phosphorous & oxygen]

10. ATP – cont’d having 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].

11. ATP – cont’d When 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]

12. Making ATP ATP is made using the ATP Synthase enzyme that makes ATP from ADP+P “synth” – as in synthesize = to make “ase” = an enzyme