Cell Membrane

Front

What are the two main functions of proteins in the cell membrane?

Back

1.) Act as gatekeepers, allowing only certain substances to enter. 2.) Serve as enzyme receptors embedded in the membrane.

Front

What forms the channels and pumps in the phospholipid bilayer?

Back

Proteins.

Front

What is NOT TRUE about the cell membrane?

Back

It contains digestive enzymes.

Front

What is the main component of the plasma membrane?

Back

Lipid.

Front

What does it mean that the cell membrane is selectively permeable?

Back

Certain things can enter while others cannot.

Front

What are phospholipids?

Back

Molecules that make up the cell membrane, consisting of hydrophilic heads and hydrophobic tails.

Front

What role do carbohydrates play in the cell membrane?

Back

They are involved in cell recognition and signaling.

Front

What is the fluid mosaic model?

Back

A model that describes the structure of the cell membrane as a mosaic of various components that move fluidly.

Front

What is the significance of cholesterol in the cell membrane?

Back

Cholesterol helps to stabilize the membrane's fluidity.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy, while active transport requires energy to move substances against their concentration gradient.