biology no 4 Diffusion Quiz

What is diffusion?

• Movement of particles from lower to higher concentration

• Movement of particles from higher to lower concentration

• Movement of particles in a circular motion

• Movement of particles from one solid to another

What does it mean when diffusion is described as passive?

• It requires energy

• It happens on its own

• It needs a catalyst

• It is a slow process

How does oxygen enter the blood from the lungs?

• By osmosis

• By diffusion

• By active transport

• By filtration

How are nutrients absorbed into the blood in the small intestine?

• By osmosis

• By diffusion

• By active transport

• By filtration

Which factor increases the rate of diffusion?

• Lower temperature

• Longer distance

• Larger concentration gradient

• Smaller concentration gradient

What is the relationship between distance and the rate of diffusion?

• Longer distance increases the rate

• Shorter distance increases the rate

• Distance has no effect

• Longer distance decreases the rate

The term for the difference in the number of particles in one area compared to another is called a (a)   .

• Temperature gradient
• Pressure gradient
• Concentration gradient
• Volume gradient

What is the role of diffusion in nutrient absorption in the gut?

• It helps in digestion

• It moves nutrients into the blood

• It breaks down food

• It stores nutrients

Which of the following is NOT a factor affecting the rate of diffusion?

• Temperature

• Distance

• Concentration gradient

• Color

Match the following formulas with their correct area calculation for a triangle.

• Area of a parallelogram

• Area = 2 x base x height

• Area of a rectangle

• Area = base x height

• Perimeter of a rectangle

• Area = base + height

• Area of a triangle

• Area = 0.5 x base x height