Cellular Transport

Phospholipids

Phospholipid Bilayer

Phospholipid Bilayer

Fluid Mosaic Model

https://www.youtube.com/watch?v=Qqsf_UJcfBc

How easily will each molecule pass through the membrane. WHY??

Cellular Transport

Passive Active

Simple Diffusion

Facilitated Diffusion

Proteins and ATP

Endocytosis

Exocytosis

Osmosis

Small, nonpolar

Hypertonic, Hypotonic, Isotonic

Carrier/Channel proteins

Passive Transport

Simple Diffusion

Osmosis

http://leavingbio.net/OSMOSIS%20AND%20DIFFUSION.htm

Solute concentration is HIGHER outside of the cell

Solute concentration is LOWER outside of the cell

Osmosis

https://www.youtube.com/watch?v=3RTvFFZxRo8

Osmosis

Osmosis Activity

Facilitated Diffusion

Carrier Protein OR Channel Proteins

Facilitated Diffusion

Carrier Protein

Channel Proteins

Passive Transport: Summary

https://www.youtube.com/watch?v=PRi6uHDKeW4

Active Transport

• Examples: sugars, amino acids, nutrients, ions, etchttps://www.youtube.com/watch?v=eDeCgTRFCbA

The Na+/K+ Active Transport Pump

Endocytosis

 Cell  eating;  endocytosis  of  solid  particles

 Cell  drinking;  endocytosis  of  fluid  droplets

The  process  of  importing  specific  macromolecules  into  the  cell  

Ex. Neutrophil Ex. Low Density Lipoprotein LDL

Exocytosis

Exports macromolecules from a cell by fusion of vesicles with the plasma membrane.

Large, polar molecules • Example: insulin secretion