Cell Transport QUEST Practice 2021

Front

What is diffusion?

Back

Diffusion is the movement of particles from an area of high concentration to an area of low concentration.

Front

What are the two layers of the cell membrane primarily composed of?

Back

The two layers of the cell membrane are primarily composed of phospholipids.

Front

What happens to a cell in an isotonic solution?

Back

A cell in an isotonic solution will stay the same size.

Front

What occurs to a cell in a hypotonic solution?

Back

A cell in a hypotonic solution will swell.

Front

What is exocytosis?

Back

Exocytosis is the process by which a cell expels materials in vesicles that fuse with the cell membrane.

Front

What is the role of phospholipids in the cell membrane?

Back

Phospholipids form the bilayer structure of the cell membrane, providing a barrier to most water-soluble substances.

Front

Define hypertonic solution in relation to cells.

Back

A hypertonic solution has a higher concentration of solutes compared to the inside of the cell, causing the cell to lose water and shrink.

Front

What is osmosis?

Back

Osmosis is the diffusion of water across a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

How does active transport differ from passive transport?

Back

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

Front

What is the significance of the fluid mosaic model?

Back

The fluid mosaic model describes the structure of the cell membrane as a mosaic of various proteins that float in or on the fluid lipid bilayer.