Cell Transport and Homeostasis Quiz

Why is cell transport crucial for maintaining homeostasis?

• It allows cells to change shape.

• It prevents cells from dividing.

• It increases the size of the cell.

• It helps regulate internal conditions.

What is a positive feedback mechanism?

• A method to decrease system output.

• A loop that amplifies the response.

• A process that stabilizes a system.

• A way to maintain constant conditions.

Which of the following is an example of a negative feedback loop?

• Childbirth

• Fruit ripening

• Thermoregulation

• Blood clotting

What characteristic of the cell membrane allows it to control what enters and exits the cell?

• Its thickness

• Its selective permeability

• Its color

• Its temperature

Which type of transport does not require energy?

• Exocytosis

• Endocytosis

• Facilitated diffusion

• Active transport

What is the main difference between simple diffusion and facilitated diffusion?

• Facilitated diffusion uses transport proteins.

• Facilitated diffusion occurs only in plants.

• Simple diffusion requires energy.

• Simple diffusion moves molecules against the gradient.

In osmosis, water moves from an area of:

• High solute concentration to low solute concentration.

• Low solute concentration to high solute concentration.

• Equal solute concentration to equal solute concentration.

• High solute concentration to high solute concentration.

What is the role of molecular pumps in active transport?

• To transport molecules without energy.

• To move molecules down the concentration gradient.

• To facilitate osmosis.

• To pump molecules against the concentration gradient.

Which process involves the cell using vesicles to bring large particles into the cell?

• Facilitated diffusion

• Simple diffusion

• Endocytosis

• Exocytosis

What is the purpose of exocytosis in cells?

• To facilitate passive transport.

• To export substances out of the cell.

• To import large particles into the cell.

• To maintain cell shape.