Cell transport

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that allows molecules to cross membranes with the assistance of special proteins. It occurs from an area of high concentration to low concentration.

Front

What is a phospholipid?

Back

A phospholipid is a molecule that is composed of a phosphate and glycerol head and two fatty acid chain tails. It is a fundamental component of cell membranes.

Front

What is active transport?

Back

Active transport is the movement of molecules across a cell membrane against the concentration gradient, requiring energy (ATP).

Front

What is osmosis?

Back

Osmosis is the diffusion of water across a semi-permeable membrane from an area of low solute concentration to an area of high solute concentration.

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 move out of the cell.

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 move into the cell.

Front

What is an isotonic solution?

Back

An isotonic solution has an equal concentration of solutes compared to the inside of the cell, resulting in no net movement of water.

Front

What is the concentration gradient?

Back

The concentration gradient is the difference in the concentration of a substance between two areas, which drives the movement of molecules.

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 role do proteins play in facilitated diffusion?

Back

Proteins act as channels or carriers that help specific molecules cross the cell membrane during facilitated diffusion.