Cell Transport

The video explores the structure and function of cells, focusing on the cell membrane's role in maintaining homeostasis. It explains passive transport mechanisms like simple and facilitated diffusion, and active transport requiring ATP. The video also covers endocytosis and exocytosis, highlighting their importance in cellular processes.

What is the primary function of the cell membrane in maintaining homeostasis?

• To store genetic information

• To provide structural support

• To produce energy for the cell

• To control what enters and exits the cell

What is the basic structure of the cell membrane?

• A carbohydrate matrix

• A phospholipid bilayer

• A rigid cellulose wall

• A single layer of proteins

Which type of molecules can pass through the cell membrane via simple diffusion?

• Large polar molecules

• Small non-polar molecules

• Ions

• Proteins

What role do transport proteins play in facilitated diffusion?

• They break down molecules

• They act as channels or carriers for molecules

• They provide energy for transport

• They store molecules

Which of the following is an example of a molecule that requires facilitated diffusion to cross the cell membrane?

• Oxygen

• Carbon dioxide

• Glucose

• Water

What is required for active transport to occur?

• Facilitated diffusion

• Simple diffusion

• ATP energy

• A concentration gradient

What process allows cells to take in large molecules by engulfing them?

• Exocytosis

• Simple diffusion

• Facilitated diffusion

• Endocytosis