Transport

Front

What is a phospholipid?

Back

A phospholipid is a type of lipid molecule that is a major component of cell membranes, consisting of two fatty acids, a glycerol unit, and a phosphate group.

Front

What is passive transport?

Back

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

Front

What are the types of passive transport?

Back

The main types of passive transport include diffusion, osmosis, and facilitated diffusion.

Front

What is endocytosis?

Back

Endocytosis is a process by which cells engulf external substances, bringing them into the cell in a vesicle.

Front

What is exocytosis?

Back

Exocytosis is the process by which cells expel materials in vesicles, releasing them outside the cell.

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What is an isotonic solution?

Back

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

Front

What is a hypotonic solution?

Back

A hypotonic solution has a lower concentration of solutes compared to the inside of the cell, causing water to enter the cell.

Front

What is a hypertonic solution?

Back

A hypertonic solution has a higher concentration of solutes compared to the inside of the cell, causing water to exit the cell.

Front

What happens to a cell in a hypotonic solution?

Back

In a hypotonic solution, water enters the cell, which may cause the cell to swell and potentially burst.