The Cell Membrane

Front

Which term or phase best describes the cell membrane?

Back

semi-permeable

Front

Which best describes the function of the cell membrane?

Back

protects and supports the cell and also controls everything that enters and leaves the cell

Front

True/False: The cell membrane allows only certain substances to enter or exit a cell.

Back

True

Front

The foundation of the cell membrane is made of primarily which molecule?

Back

phospholipid

Front

Because the molecules of the cell membrane are in constant motion and because of the different molecules that make up the membrane, it is frequently described as a...

Back

fluid mosaic

Front

True/False: Cell membranes and the membranes that bound organelles (known as plasma membranes) are structurally very different.

Back

False

Front

A hydrophobic substance...

Back

repels from water

Front

A hydrophilic substance...

Back

is attracted to water

Front

The phospholipids that make up plasma membranes are arranged in a ____________ structure.

Back

bi-layer

Front

What happens when 2 phospholipid molecules are dropped into water next to each other?

Back

The hydrophobic side of the molecules will turn towards each other and away from the water. The hydrophilic sides of the molecules will turn away from each other and towards the water (see picture B)