Cell Functions Review

Front

What is osmosis?

Back

Osmosis is a form of passive transport that involves the movement of water molecules across a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is active transport?

Back

Active transport is the movement of substances across a cell membrane against their concentration gradient, which requires energy (ATP).

Front

What role does oxygen play in photosynthesis and cellular respiration?

Back

Oxygen is a product of photosynthesis and a reactant of cellular respiration.

Front

What is passive transport?

Back

Passive transport is the movement of particles across a cell membrane from an area of high concentration to an area of low concentration without the use of energy.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process by which molecules move across a cell membrane from an area of high concentration to an area of low concentration through a carrier protein.

Front

Define diffusion.

Back

Diffusion is the process by which molecules spread from areas of high concentration to areas of low concentration until equilibrium is reached.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane is a barrier that allows certain substances to pass through while blocking others.

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 and moves substances against their concentration gradient.

Front

What is the concentration gradient?

Back

The concentration gradient is the difference in the concentration of a substance across a space, which drives the movement of particles.

Front

What is the role of carrier proteins in facilitated diffusion?

Back

Carrier proteins assist in the transport of specific molecules across the cell membrane by changing shape to allow the molecule to pass through.