Cell Transport Quiz

What is diffusion?

• The movement of particles from an area of low concentration to an area of high concentration.

• The movement of particles from an area of high concentration to an area of even higher concentration.

• The movement of particles from an area of high concentration to an area of low concentration.

• The movement of particles from an area of low concentration to an area of even lower concentration.

Explain the process of osmosis.

• Water molecules move from an area of low water concentration to an area of high water concentration

• Water molecules move from an area of high water concentration to an area of low water concentration

• Osmosis is the movement of salt molecules from high concentration to low concentration

• Osmosis is the movement of water molecules from an area of high sugar concentration to low sugar concentration

Give an example of passive transport in a cell.

• Active transport

• Endocytosis

• Exocytosis

• Diffusion

What is the main difference between active transport and passive transport?

• Active transport requires energy, while passive transport does not.

• Active transport only occurs in plant cells, while passive transport only occurs in animal cells.

• Active transport is faster than passive transport.

• Active transport moves substances from low to high concentration, while passive transport moves substances from high to low concentration.

Describe facilitated diffusion and provide an example.

• Facilitated diffusion: movement of water across the cell membrane

• Example: Glucose transport into red blood cells

• Example: Sodium transport into muscle cells

• Example: Oxygen transport into white blood cells

Why is diffusion considered a passive process?

• Because it only occurs in active cells

• Because it does not require energy input from the cell.

• Because it actively moves molecules across the cell membrane

• Because it requires ATP to function

How does osmosis affect a cell placed in a hypertonic solution?

• The cell will remain unchanged

• The cell will gain water and expand

• The cell will lose water and shrink

• The cell will burst

What type of transport requires energy - active or passive?

• Neutral

• Active

• Inactive

• Passive

Explain the role of transport proteins in facilitated diffusion.

• Transport proteins prevent the movement of specific molecules across the cell membrane.

• Transport proteins facilitate the movement of specific molecules across the cell membrane.

• Transport proteins are not involved in the movement of molecules across the cell membrane.

• Transport proteins only allow the movement of water across the cell membrane.

Compare and contrast diffusion and active transport.

• Diffusion and active transport both require energy to move molecules across the cell membrane.

• Diffusion and active transport both require the use of carrier proteins to move molecules across the cell membrane.

• Diffusion and active transport both involve the movement of molecules from an area of lower concentration to an area of higher concentration.

• Diffusion is passive transport, while active transport is energy-dependent.