Active and Passive Transport Review

Front

What is 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 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 is passive transport?

Back

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

Front

What is phagocytosis?

Back

Phagocytosis is a type of active transport where cells engulf large particles or other cells, often referred to as 'cell eating'.

Front

What does isotonic mean?

Back

Isotonic refers to a solution where the concentration of solute molecules is equal inside and outside the cell, resulting in no net movement of water.

Front

What is the role of ATP in active transport?

Back

ATP provides the energy required for active transport to move substances against their concentration gradient.

Front

What is the difference between hypertonic and hypotonic solutions?

Back

Hypertonic solutions have a higher concentration of solutes compared to the cell, causing water to leave the cell; hypotonic solutions have a lower concentration of solutes, causing water to enter the cell.

Front

What is osmosis?

Back

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

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 exocytosis?

Back

Exocytosis is the process by which cells expel materials in vesicles, often used to secrete hormones or neurotransmitters.