Cell Transport: Passive vs. Active Review

Front

What is active transport?

Back

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

Front

What is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, moving down their concentration gradient.

Front

What role does the cell membrane play in homeostasis?

Back

The cell membrane controls what substances enter and leave the cell, helping to maintain a stable internal environment.

Front

What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, water moves from inside the cell to the outside solution, causing the cell to shrink.

Front

What happens to a cell in an isotonic solution?

Back

In an isotonic solution, the cell remains the same size as water moves equally in and out of the cell.

Front

What is diffusion?

Back

Diffusion is the process by which molecules spread from areas of high concentration to areas of low concentration.

Front

What is osmosis?

Back

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

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance across a space.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses transport proteins to help move substances across the cell membrane.

Front

What is the difference between endocytosis and exocytosis?

Back

Endocytosis is the process of taking substances into the cell, while exocytosis is the process of expelling substances from the cell.