Cell Transport

Most eukaryotes have _______________________ organelles.

By regulating what goes in and out of the cell, the cell membrane helps to regulate...

The major part of the cell membrane is/are the

Draw a picture of a phospholipid and label the regions that are: polar, and nonpolar.

Which parts of the phospholipid make the inner layer or region of the bilayer?

Very small nonpolar molecules such as gases like carbon dioxide, are able to go through the cell membrane in a process called

Simple diffusion is also classified as

In passive transport, particles move through the cell membrane with the concentration gradient (or moves with the flow), which means that

Sometimes particles need assistance crossing the phospholipid bilayer, because they are _________________ and need the help of a transport protein.

When help is needed by transport protein, the transport proteins may ... in a process called facilitated diffusion.

Facilitated diffusion is also considered passive transport, because:

- it does not require energy

- it moves particles with the concentration gradient

Give three examples of facilitated diffusion or passive transport.

The other type of transport is ____________________, which requires energy, because it moves particles against the concentration gradient.

ATP, also known as _______________________, contains a large amount of energy that is released when a phosphate bond is broken.

The sodium-potassium pump is an example of

Sometime very large particles like polysaccharides are needed by a cell and are taken in by a cell through a process called endocytosis, which is requires

Endocytosis is a general term for the following

The process in #16 is

Moving extracellular fluid from outside a cell to inside a cell is called

Low density lipoproteins (LDL cholesterol) require receptors in order to be transported into a cell. This is an example of

Exocytosis is can be used to