Cell Boundaries and Transport

Front

What is active transport?

Back

Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy.

Front

What is passive transport?

Back

Passive transport is the movement of molecules across a cell membrane without the use of energy, typically from a region of higher concentration to a region of lower concentration.

Front

Define isotonic solution.

Back

An isotonic solution is one where the concentration of solutes outside the cell is equal to the concentration of solutes inside the cell.

Front

What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, water moves out of the cell, causing it to shrink.

Front

What happens to a cell in a hypotonic solution?

Back

In a hypotonic solution, water moves into the cell, causing it to swell and potentially burst.

Front

What is exocytosis?

Back

Exocytosis is the process by which large materials are expelled from a cell.

Front

What is endocytosis?

Back

Endocytosis is the process by which cells take in large materials by engulfing them.

Front

What is the role of the cell membrane?

Back

The cell membrane controls the movement of substances in and out of the cell, maintaining homeostasis.

Front

What is the difference between diffusion and osmosis?

Back

Diffusion is the movement of molecules from high to low concentration, while osmosis specifically refers to the movement of water across a semipermeable membrane.

Front

What is a semipermeable membrane?

Back

A semipermeable membrane allows certain molecules to pass through while blocking others.