Active and Passive 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 input.

Front

What is Passive Transport?

Back

Passive Transport is the movement of molecules across a cell membrane without the use of energy, typically from a region of higher concentration to a region of lower concentration.

Front

Define Isotonic solution.

Back

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

Front

Define Hypertonic solution.

Back

A Hypertonic solution has a higher concentration of solute outside the cell than inside, causing water to move out of the cell, leading to cell shrinkage.

Front

Define Hypotonic solution.

Back

A Hypotonic solution has a lower concentration of solute outside the cell than inside, causing water to move into the cell, which may lead to cell swelling or bursting.

Front

What does 'semi-permeable' mean?

Back

Semi-permeable means that a membrane allows some molecules to pass through while blocking others.

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 Equilibrium in terms of concentration?

Back

Equilibrium is the state where the concentrations of two substances are balanced and there is no net movement of molecules.

Front

What is Phagocytosis?

Back

Phagocytosis is a type of endocytosis where a cell engulfs large particles or cells, often referred to as 'cell eating'.

Front

What is Pinocytosis?

Back

Pinocytosis is a type of endocytosis where a cell takes in liquid from the surrounding environment, often referred to as 'cell drinking'.