Cell Processes

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane is a biological membrane that allows certain substances to pass through while blocking others, thus regulating the movement of materials in and out of the cell.

Front

What is active transport?

Back

Active transport is the process by which particles move from an area of low concentration to an area of high concentration, using energy (usually in the form of ATP) to do so.

Front

What is endocytosis?

Back

Endocytosis is the process by which a cell membrane surrounds and encloses a large particle, allowing it to be brought into the cell.

Front

What is the main source of energy for all life?

Back

The main source of energy for all life comes from the sun, which provides energy through photosynthesis.

Front

What is equilibrium in the context of diffusion?

Back

Equilibrium in the context of diffusion refers to the state where the concentration of particles is equal throughout a space, resulting in no net movement of particles.

Front

What role does the cell membrane play in cellular processes?

Back

The cell membrane acts as a barrier that regulates the entry and exit of substances, maintaining homeostasis within the cell.

Front

What is diffusion?

Back

Diffusion is the passive movement of particles from an area of higher concentration to an area of lower concentration until equilibrium is reached.

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 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 is the function of transport proteins in the cell membrane?

Back

Transport proteins facilitate the movement of substances across the cell membrane, either by passive or active transport mechanisms.