Cell Basics, Cell Cycle, and Cell Transport Review

Front

What is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, typically following the concentration gradient.

Front

Why is passive transport called 'passive'?

Back

It is called 'passive' because it occurs without the expenditure of energy.

Front

What is the primary function of the plasma membrane?

Back

The plasma membrane serves as a barrier that regulates what enters and exits the cell, maintaining homeostasis.

Front

What are phospholipids?

Back

Phospholipids are molecules that make up the cell membrane, consisting of a phosphate group, a glycerol backbone, and two fatty acid tails.

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules across a semi-permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What is the difference between diffusion and facilitated diffusion?

Back

Diffusion is the movement of molecules from high to low concentration without assistance, while facilitated diffusion requires specific transport proteins to help move molecules across the membrane.

Front

What is active transport?

Back

Active transport is the movement of substances against their concentration gradient, requiring energy (usually in the form of ATP).

Front

What role do proteins play in the cell membrane?

Back

Proteins in the cell membrane assist in transport, act as receptors for signaling, and provide structural support.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance between two areas, which drives the movement of molecules.

Front

What is the function of the cell wall?

Back

The cell wall provides structural support and protection to the cell, primarily found in plant cells, fungi, and bacteria.