Cell Transport Quiz

What is diffusion?

• A) The movement of water molecules across a semipermeable membrane from an area of low solute concentration to an area of high solute concentration.

• B) The active transport of molecules against the concentration gradient, requiring energy.

• C) The movement of molecules from an area of high concentration to an area of low concentration until equilibrium is reached.

• D) The process by which cells engulf materials from the external environment.

What is osmosis?

• A) The movement of solute molecules across a membrane.

• B) The movement of water molecules through a semipermeable membrane from an area of high water concentration to an area of low water concentration.

• C) The process of moving ions from an area of low concentration to an area of high concentration using energy.

• D) The release of substances from a cell into the extracellular space.

Which of the following is an example of active transport?

• A) Diffusion of oxygen from the lungs into the bloodstream.

• B) Osmosis of water into the root cells of a plant.

• C) The sodium-potassium pump moving ions against their concentration gradient.

• D) Carbon dioxide moving from blood cells into the alveoli.

Passive transport includes which of the following processes?

• A) Endocytosis

• B) Exocytosis

• C) Osmosis

• D) Active transport

What is endocytosis?

• A) The process of expelling materials from a cell into the extracellular fluid.

• B) The movement of water molecules from an area of low solute concentration to an area of high solute concentration.

• C) The process by which cells ingest external fluid, macromolecules, and large particles, including other cells.

• D) The movement of molecules from an area of low concentration to an area of high concentration.

Exocytosis is the process of:

• A) Cells absorbing molecules by engulfing them.

• B) Molecules moving from a high concentration area to a low concentration area.

• C) Cells releasing large amounts of material.

• D) Water moving across a semipermeable membrane.

Which of the following does NOT require energy?

• A) Active transport

• B) Diffusion

• C) Endocytosis

• D) Sodium-potassium pump

In osmosis, water moves towards the area with:

• A) Higher temperature.

• B) Lower solute concentration.

• C) Higher solute concentration.

• D) Lower pressure.

Which of the following is true about passive transport?

• A) It moves substances against the concentration gradient.

• B) It requires cellular energy in the form of ATP.

• C) It includes processes like diffusion and osmosis.

• D) It is the process by which cells release waste products.

Active transport differs from passive transport in that active transport:

• A) Does not require energy.

• B) Requires energy to move substances against their concentration gradient.

• C) Only involves the movement of water molecules.

• D) Does not involve the movement of substances across cell membranes.