Exchange in Biology

What is the primary gas that plants take in for photosynthesis?

• Oxygen

• Carbon dioxide

• Nitrogen

• Hydrogen

Which of the following is NOT a method of transport in animals?

• Diffusion

• Active transport

• Photosynthesis

• Bulk flow

Why is a high surface area to volume ratio beneficial for cells?

• It slows down the rate of diffusion.

• It decreases the efficiency of gas exchange.

• It increases the rate of heat loss.

• It increases the efficiency of material exchange.

What is diffusion?

• The movement of water molecules across a semi-permeable membrane.

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

• The active transport of molecules against the concentration gradient.

• The bulk movement of materials through the circulatory system.

What is osmosis?

• The movement of solutes across a semi-permeable membrane.

• The movement of water molecules from an area of high water potential to an area of low water potential.

• The active transport of water molecules.

• The diffusion of gases through the respiratory surface.

Which of the following is an adaptation of the small intestine for efficient nutrient exchange?

• Decreased surface area

• Thick walls

• Villi and microvilli

• Low blood supply

What is the primary function of the alveoli in the lungs?

• To pump blood throughout the body

• To filter out impurities from the blood

• To facilitate the exchange of gases

• To store oxygen

How do fish increase the efficiency of gas exchange?

• By decreasing the surface area of gills

• By using lungs instead of gills

• By maintaining a countercurrent flow of water over the gills

• By reducing the blood flow to the gills

What is the significance of the large surface area of the root hair cells in plants?

• It decreases the absorption of water and minerals.

• It increases the absorption of water and minerals.

• It reduces the rate of photosynthesis.

• It increases the rate of transpiration.

Which of the following is NOT a function of the xylem in plants?

• Transport of water

• Transport of minerals

• Transport of oxygen

• Providing structural support