Plasma Membrane and Transport Practice

Front

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

Back

It means that certain substances can enter the cell while others cannot.

Front

What is another name for the plasma membrane?

Back

Cell membrane.

Front

What happens to a cell in a hypertonic solution?

Back

The cell will lose water and shrink.

Front

What type of transport does NOT require energy?

Back

Passive Transport.

Front

Which process is NOT a form of active transport?

Back

Osmosis.

Front

What are the main functions of the plasma membrane?

Back

To protect the cell, provide structure, and regulate the movement of substances in and out of the cell.

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.

Front

What is osmosis?

Back

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

Front

What role do proteins play in the plasma membrane?

Back

Proteins assist in transport, act as receptors, and provide structural support.

Front

What is the fluid mosaic model?

Back

A model that describes the structure of the plasma membrane as a mosaic of various components (lipids, proteins, carbohydrates) that move fluidly.