cell membrane transport

Front

What does 'bilayer' mean?

Back

Two layers.

Front

What is the hydrophobic region of the cell membrane?

Back

The hydrophobic region is the part of the membrane that repels water, typically composed of fatty acid tails of phospholipids.

Front

What is one major difference between passive and active transport?

Back

Active transport uses energy; passive transport does not.

Front

Osmosis is the diffusion of __________.

Back

Water.

Front

What forms the channels and pumps in the phospholipid bilayer?

Back

Proteins.

Front

What is the function of the cell membrane?

Back

To protect the cell and regulate what enters and exits.

Front

Define passive transport.

Back

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

Front

Define active transport.

Back

The movement of substances against their concentration gradient, requiring energy.

Front

What is a phospholipid?

Back

A molecule that makes up the cell membrane, consisting of a hydrophilic head and two hydrophobic tails.

Front

What role do carbohydrates play in the cell membrane?

Back

They are involved in cell recognition and signaling.