Understanding Passive Transport

What is passive transport?

• Passive transport is the active movement of substances against a concentration gradient.

• Passive transport only occurs in plant cells.

• Passive transport requires energy to move substances.

• Passive transport is the movement of substances across a cell membrane without the use of energy.

How do solute molecules move during passive transport?

• Solute molecules move from high to low concentration without energy.

• Solute molecules are actively transported against the concentration gradient.

• Solute molecules move from low to high concentration using energy.

• Solute molecules move randomly without any concentration gradient.

What are the two types of diffusion mentioned?

• Active transport and passive transport

• Endocytosis and exocytosis

• Passive diffusion and facilitated diffusion

• Osmosis and filtration

What is simple diffusion?

• The process of molecules being absorbed by a cell through endocytosis.

• Active transport of molecules against a concentration gradient.

• Simple diffusion is the passive movement of molecules across a membrane from high to low concentration.

• The movement of water through a selectively permeable membrane.

Does simple diffusion require membrane proteins?

• Yes, simple diffusion requires membrane proteins.

• Simple diffusion requires specific transport proteins.

• No, simple diffusion does not require membrane proteins.

• Membrane proteins facilitate simple diffusion.

What role does kinetic motion play in diffusion?

• Kinetic motion slows down the movement of particles, hindering diffusion.

• Kinetic motion drives the random movement of particles, facilitating diffusion by allowing them to spread from high to low concentration.

• Kinetic motion only occurs in gases and does not influence diffusion in liquids.

• Kinetic motion has no effect on the concentration of particles during diffusion.

What types of substances can diffuse through body fluids?

• Proteins and nucleic acids

• Large polar molecules

• Small nonpolar molecules, water, and some ions.

• Complex carbohydrates

What is facilitated diffusion?

• Facilitated diffusion is a type of passive transport that uses membrane proteins to help substances cross the cell membrane.

• Facilitated diffusion is a type of active transport that moves substances against their concentration gradient.

• Facilitated diffusion requires energy input to transport substances.

• Facilitated diffusion only occurs in plant cells and not in animal cells.

How does facilitated diffusion differ from simple diffusion?

• Facilitated diffusion occurs only in plant cells; simple diffusion occurs in all cells.

• Simple diffusion requires energy input; facilitated diffusion does not.

• Facilitated diffusion uses transport proteins; simple diffusion does not.

• Facilitated diffusion is faster than simple diffusion in all cases.

What factors influence the process of diffusion?

• Pressure of the environment

• Concentration gradient, temperature, surface area, and medium properties.

• Humidity levels

• Color of the substance