Diffusion, Osmosis and Active Transport

What is an example of active transport in cells?

• Sodium-potassium pump

• Facilitated diffusion

• Osmosis

• Endocytosis

What is the significance of diffusion in biological systems?

• Diffusion is crucial for processes such as gas exchange in lungs and nutrient absorption in cells.

• Diffusion is primarily responsible for the movement of water in plants.

• Diffusion helps in the formation of new cells during cell division.

• Diffusion is the main mechanism for the synthesis of proteins in cells.

Is the movement of perfume in the air an example of diffusion, osmosis, or active transport?

• Diffusion

• Osmosis

• Active Transport

• Facilitated Diffusion

What is the difference between passive and active transport?

• Passive transport requires energy to move substances against their concentration gradient, while active transport does not require energy and moves substances down their concentration gradient.

• Passive transport does not require energy and moves substances down their concentration gradient, while active transport requires energy to move substances against their concentration gradient.

• Both passive and active transport require energy to move substances across membranes.

• Passive transport is faster than active transport regardless of the concentration gradient.

What is osmosis?

• The movement of solutes from high concentration to low concentration.

• The diffusion of water molecules through a semi-permeable membrane from an area of low concentration to an area of high concentration.

• The process of active transport of nutrients into a cell.

• The evaporation of water from a surface.

What is the role of concentration gradient in diffusion?

• It prevents the movement of molecules between areas.

• It is the difference in concentration that drives molecules from low to high concentration.

• It is the difference in concentration of a substance between two areas, driving the movement of molecules from high to low concentration.

• It has no effect on the movement of molecules.

What is an example of diffusion in everyday life?

• The smell of freshly baked cookies spreading throughout a house.

• Water boiling in a pot.

• Ice melting in a glass of water.

• A car moving on a highway.

What is the main difference between diffusion and osmosis?

• Diffusion refers to the movement of all types of molecules, while osmosis specifically refers to the movement of water.

• Diffusion is the movement of water only, while osmosis involves all types of molecules.

• Diffusion occurs only in gases, while osmosis occurs in liquids.

• Diffusion is a passive process, while osmosis requires energy.

What happens to water molecules during osmosis?

• Water molecules move through a semi-permeable membrane from an area of low concentration to an area of high concentration.

• Water molecules remain stationary and do not move through the membrane.

• Water molecules move through a semi-permeable membrane from an area of high concentration to an area of low concentration.

• Water molecules are absorbed by the semi-permeable membrane and do not pass through.

Can diffusion occur in solids, liquids, and gases?

• No, diffusion only occurs in liquids and gases.

• Yes, diffusion can occur in solids, liquids, and gases.

• Diffusion only occurs in gases.

• Diffusion occurs only in liquids.