Cell Membrane & Transport

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 lower solute concentration to an area of higher solute concentration.

Front

What type of transport requires the use of transport proteins?

Back

Facilitated diffusion is a type of passive transport that requires the use of transport proteins or channel proteins to help move substances across the cell membrane.

Front

What is a hypotonic solution?

Back

A hypotonic solution is one where the concentration of solutes is lower outside the cell than inside, causing water to flow into the cell, potentially leading to swelling or bursting.

Front

Define hydrophilic.

Back

Hydrophilic means 'water-loving' and refers to substances that are attracted to water and can dissolve in it.

Front

What is endocytosis?

Back

Endocytosis is a type of active transport that involves the cell membrane enclosing a particle to form a vesicle, allowing the particle to enter the cell.

Front

What is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, relying on concentration gradients.

Front

What is active transport?

Back

Active transport is the movement of substances across a cell membrane against their concentration gradient, requiring energy (usually in the form of ATP).

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a process of passive transport where molecules move across the cell membrane through protein channels.

Front

What is a hypertonic solution?

Back

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

Front

What does it mean if a cell is in an isotonic solution?

Back

In an isotonic solution, the concentration of solutes is equal inside and outside the cell, resulting in no net movement of water.