Unit 2: Cells and Cell Transport

Front

What is active transport?

Back

Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy (ATP).

Front

What organelle is responsible for energy production in cells?

Back

Mitochondria are the organelles that produce energy (ATP) through cellular respiration.

Front

What is diffusion?

Back

Diffusion is the passive movement of molecules from an area of high concentration to an area of low concentration until equilibrium is reached.

Front

What is osmosis?

Back

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

Front

What role do ribosomes play in the cell?

Back

Ribosomes are the cell organelles that synthesize proteins by translating messenger RNA (mRNA).

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process of passive transport of molecules across a cell membrane via specific transmembrane proteins.

Front

What is the difference between passive and active transport?

Back

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

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane allows certain molecules or ions to pass through it while blocking others, maintaining the internal environment of the cell.

Front

What is the function of the Golgi body?

Back

The Golgi body modifies, sorts, and packages proteins and lipids for secretion or delivery to other organelles.

Front

What is the role of vacuoles in cells?

Back

Vacuoles are storage organelles that can hold various substances, including nutrients, waste products, and water.