Understanding the Cell Membrane

What is the main function of the phospholipid tails in the cell membrane?

• To bond with proteins

• To attract water molecules

• To repel water molecules

• To transport nutrients

How do substances typically enter and exit a cell?

• Via protein channels

• Through the lipid bilayer

• Through active transport only

• By osmosis

What role do protein channels play in the cell membrane?

• They store energy for the cell

• They provide structural support

• They act as a barrier to all substances

• They facilitate the movement of substances in and out of the cell

What is an intracellular receptor?

• A receptor that only works with small molecules

• A receptor that stays outside the cell

• A receptor that receives signals from within the cell

• A receptor that receives signals from outside the cell

How does a membrane receptor function similarly to a cell phone?

• It only works with specific types of signals

• It stores messages for later use

• It transmits messages without entering the cell

• It sends signals directly to the nucleus