Unit 5 Review

Front

What is homeostasis?

Back

Homeostasis is the ability of an organism to maintain a stable internal environment despite changes in external conditions.

Front

How do cell membranes help maintain homeostasis?

Back

Cell membranes control the substances that enter or leave cells, thus helping to maintain a stable internal environment.

Front

What does it mean for a cell membrane to be selectively permeable?

Back

A selectively permeable membrane allows certain substances to pass through while blocking others, regulating the internal environment of the cell.

Front

Which types of molecules can easily diffuse across the cell membrane?

Back

Small nonpolar molecules like oxygen (O₂) and carbon dioxide (CO₂) can easily diffuse across the cell membrane.

Front

What is the role of stem cells in cell specialization?

Back

Stem cells can differentiate into various types of specialized cells, playing a crucial role in development and tissue repair.

Front

Which organelle is responsible for processing and packaging materials for export from the cell?

Back

The Golgi apparatus (often labeled as 'E' in diagrams) is responsible for processing and packaging materials for export.

Front

What is the function of the cell membrane?

Back

The cell membrane protects the cell, provides structure, and regulates the movement of substances in and out of the cell.

Front

What are the main components of a cell membrane?

Back

The main components of a cell membrane are phospholipids, proteins, cholesterol, and carbohydrates.

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 molecules through a selectively permeable membrane.