Final Review 4 - Plasma Membrane

Front

What is the primary function of the plasma membrane?

Back

The plasma membrane protects and supports the cell while controlling the movement of substances in and out of the cell.

Front

What is the structure of the lipid bilayer in the plasma membrane?

Back

The lipid bilayer is composed of two layers of phospholipids.

Front

What is another name for the plasma membrane?

Back

Cell membrane.

Front

What are the main components of the plasma membrane?

Back

The plasma membrane is mostly made of phospholipids, along with proteins and carbohydrates.

Front

What does it mean for the plasma membrane to be selectively permeable?

Back

It means that the plasma membrane allows certain substances to pass through while blocking others.

Front

What role do membrane-spanning proteins play in the plasma membrane?

Back

They help transport substances across the membrane and facilitate communication between the cell and its environment.

Front

What is the significance of carbohydrates in the plasma membrane?

Back

Carbohydrates are involved in cell recognition and signaling.

Front

How does the fluid mosaic model describe the plasma membrane?

Back

The fluid mosaic model describes the plasma membrane as a flexible structure with various proteins floating in or on the fluid lipid bilayer.

Front

What is the difference between passive and active transport across the plasma membrane?

Back

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

Front

What is osmosis in relation to the plasma membrane?

Back

Osmosis is the diffusion of water across a selectively permeable membrane.