Cell Transport

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

Name three types of passive transport.

Back

1. Simple diffusion 2. Facilitated diffusion 3. Osmosis

Front

What is active transport?

Back

Active transport is the movement of molecules against their concentration gradient, requiring energy (usually in the form of ATP).

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules across a selectively permeable membrane.

Front

What does it mean for a solution to be hypertonic to a cell?

Back

A hypertonic solution has a higher concentration of solute compared to the inside of the cell, causing water to move out of the cell.

Front

What does it mean for a solution to be hypotonic to a cell?

Back

A hypotonic solution has a lower concentration of solute compared to the inside of the cell, causing water to move into the cell.

Front

What is endocytosis?

Back

Endocytosis is a process by which cells engulf substances from their external environment, bringing them into the cell.

Front

What is exocytosis?

Back

Exocytosis is the process by which cells expel materials to the outside environment, often using vesicles.

Front

How does concentration gradient affect the movement of molecules?

Back

Molecules tend to move from areas of high concentration to areas of low concentration, following the concentration gradient.

Front

What role do transport proteins play in facilitated diffusion?

Back

Transport proteins assist in the movement of specific molecules across the cell membrane without using energy.