2.4 Membranes

Crash Course Biology: In Da Club – Membranes and Transport, by Hank

Essential Biology 2.4: Membranes

Fluid Mosaic Model Tutorial from Davidson.edu

Fluid Mosaic Model Tutorial from Davidson.edu

For lots more animations on cell structure and function and cell transport, visit North Harris College.

You can also work through the Membranes lessons from HippoCampus Biology.

……….o0O0o……….

Membrane Structure: The Fluid Mosaic Model

……….o0O0o……….

Hydrophilic and hydrophobic properties maintain the phospholipid bilayer

Membrane Fluidity

The fluid nature of the plasma membrane allows for nuclear transfer to take place in cloning.

……….o0O0o……….

Functions of Membrane Proteins

Hormone binding sites, immobilized enzymes, cell adhesion, cell-to-cell communication, channels for passive transport, and pumps for active transport.

……….o0O0o……….

The plasma membrane is selectively permeable

……….o0O0o……….

Diffusion and Osmosis

Try these in the lab: Plasmolysis of Elodea and of onion cells.
……….o0O0o……….

Facilitated Diffusion

……….o0O0o……….

Active Transport & ATP

……….o0O0o……….

Vesicle Transport: Endo- and Exocytosis

……….o0O0o……….

Amoebae are single-celled eukaryotes, which can carry out all the functions of life. The fluidity of their plasma membrane allows them to feed through phagocytosis (endocytosis of solids):

What if boat sails were soap bubbles? From xkcd

……….o0O0o……….

Further Reading:

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

Follow

Get every new post delivered to your Inbox.

Join 346 other followers

%d bloggers like this: