Types of Cellular Transport  Passive Transport  Does NOT require energy cell doesn’t use energy 1.Diffusion 2.Facilitated Diffusion 3.Osmosis  Active Transport  REQUIRES ENERGY cell does use energy 1.Protein Pumps 2.Endocytosis 3.Exocytosis high low This is gonna be hard work!! high low Weeee!! !

2 Facilitated Diffusion * Is a type of passive transport Doesn’t require energy Uses transport proteins to move molecules from high to low concentration

Facilitated Diffusion Facilitated Diffusion- is the movement of larger molecules like glucose through the cell membrane  larger molecules must be “helped” Examples: Glucose or amino acids moving from blood into a cell.

Facilitated diffusion Molecules move from high solute concentration to low solute concentration through a protein channel NO ENERGY IS NEEDED = PASSIVE TRANSPORT

Types of Cellular Transport  Passive Transport  Does NOT require energy cell doesn’t use energy 1.Diffusion 2.Facilitated Diffusion 3.Osmosis  Active Transport  REQUIRES ENERGY cell does use energy 1.Protein Pumps 2.Endocytosis 3.Exocytosis high low This is gonna be hard work!! high low Weeee!! !

Active Transport Requires Energy. ATP (form of energy made by mitochondria). Moves against the concentration gradient. High low This is going to be hard work!!

Sodium Potassium Pump What I need to know Active transport goes AGAINST the concentration gradient Low solute concentration to high solute concentration -imDC1txWw

Sodium Potassium Pump What I need to know The cell uses energy (ATP) to actively transport Na + out of the cell and K + into the cell against the concentration gradient For every 3 ATP used, 3 Na + go out, and 2 K + in -imDC1txWw

Food is moved into the cell by Endocytosis Wastes are moved out of the cell by Exocytosis Endocytosis and Exocytosis is the mechanism by which very large molecules (such as food and wastes) get into and out of the cell **ENERGY IS REQUIRED

Endocytosis Transporting material into a cell by the in folding of a membrane. Think endo- Think enter To take inside of the cell

2 Types of Endocytosis Phagocytosis- Solid particles are ingested into the cell. Pinocytosis – liquids and very small molecules are taken into the cell.

Ex: White Blood Cells, which are part of the immune system, surround and engulf bacteria by endocytosis.

Endocytosis

Exocytosis Moves materials out of the cell Think exo- Think exit

15 Moving the “Big Stuff” Molecules are moved out of the cell by vesicles that fuse with the plasma membrane. Exocytosis- moving things out. This is how many hormones are secreted and how nerve cells communicate with one another.

16 Exocytosis Exocytosis vesicle immediately after fusion with plasma membrane.