Spaced Practice: Week 23

What is the process called when water moves across a semipermeable membrane from an area of low solute concentration to an area of high solute concentration?

• A) Active transport

• B) Osmosis

• C) Diffusion

• D) Endocytosis

What is the main difference between diffusion and facilitated diffusion?

• A) Diffusion requires energy, while facilitated diffusion does not.

• B) Facilitated diffusion requires energy, while diffusion does not.

• C) Diffusion can only move water, while facilitated diffusion can move other molecules.

• D) Facilitated diffusion requires the help of transport proteins, while diffusion does not.

Endocytosis is a process by which a cell

• A) Releases substances outside the cell.

• B) Takes in substances from the outside environment.

• C) Maintains equilibrium with its environment.

• D) Produces energy.

Which of the following statements is true about passive transport?

• A) It moves molecules from an area of low concentration to an area of high concentration.

• B) It requires cellular energy to move molecules.

• C) It includes processes such as osmosis and diffusion.

• D) It is the only way cells can take in nutrients.

What is the role of transport proteins in the semipermeable membrane?

• A) To provide energy for active transport

• B) To facilitate the diffusion of molecules that cannot directly cross the membrane

• C) To synthesize new molecules for cellular repair

• D) To act as receptors for cellular communication