Cell Membrane and Transport

Front

What is the function of the plasma membrane?

Back

To regulate what enters and leaves the cell.

Front

What is the process called when materials move from low concentration to high concentration across a membrane?

Back

Active Transport

Front

What is the term for the movement of materials that requires energy?

Back

Active Transport

Front

What do channel proteins do in the cell membrane?

Back

They facilitate the transport of substances across the membrane.

Front

What characterizes a hypotonic environment?

Back

Too much water in the cell will cause the cell to burst - the percentage of water is higher outside the cell than inside the cell.

Front

What is osmosis?

Back

The movement of water across a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is passive transport?

Back

The movement of substances across a cell membrane without the use of energy.

Front

What are phospholipids?

Back

Molecules that make up the cell membrane, consisting of a hydrophilic head and two hydrophobic tails.

Front

What role do glycoproteins play in the cell membrane?

Back

They are involved in cell recognition and signaling.

Front

What is the difference between active transport and passive transport?

Back

Active transport requires energy to move substances against their concentration gradient, while passive transport does not.