Exploring Types of Passive Transport

What is a key characteristic of passive transport?

• It requires energy.

• It moves molecules from low to high concentration.

• It does not require energy.

• It only occurs in plant cells.

What is required for passive transport to occur?

• ATP

• High temperature

• A concentration gradient

• A membrane

In the example of diffusion given, what causes the cookie smell to spread throughout the house?

• Addition of energy

• Concentration gradient

• Active transport

• Presence of a membrane

Which of the following is an example of diffusion in cells?

• Movement of oxygen gas into a cell

• Movement of water through a membrane

• Movement of ions through a pump

• Movement of glucose through protein channels

What distinguishes facilitated diffusion from simple diffusion?

• It only occurs in plant cells.

• It involves protein channels.

• It moves molecules from low to high concentration.

• It requires energy.

Which type of molecules typically use facilitated diffusion?

• Large or charged molecules

• Small uncharged molecules

• Water molecules

• Gaseous molecules

What is osmosis specifically concerned with?

• Movement of gases

• Movement of water

• Movement of ions

• Movement of glucose

In osmosis, what determines the direction of water movement?

• Presence of protein channels

• Concentration of water

• Temperature

• Concentration of solute

What happens to a cell in a hypertonic environment?

• It gains water.

• It loses water.

• It remains unchanged.

• It bursts.

What is the condition called when the solute concentration is equal inside and outside the cell?

• Hypotonic

• Hypertonic

• Isotonic

• Equilibrium