3.1.1 Surface area to volume ratio

• Match the ratio with its characteristics:

  High ratio ↔️ Large surface area, small volume

  Low ratio ↔️ Small surface area, large volume
• Why is the surface area to volume ratio crucial for exchange processes?

  Allows efficient exchange
• Larger organisms with a lower surface area to volume ratio have more efficient exchange processes.

  False
• Larger organisms develop specialized systems to enhance exchange efficiency due to their lower surface area to volume ratio.


  True
• What is the surface area to volume ratio?

  Surface area divided by volume
• As size increases, the surface area to volume ratio decreases
• A higher surface area to volume ratio allows for more efficient exchange in living organisms.

  True
• Arrange the following ratios from highest to lowest efficiency of exchange:

  1️⃣ High surface area to volume ratio

  2️⃣ Low surface area to volume ratio
• A high surface area to volume ratio is advantageous for exchange surfaces in living organisms.

  True
• A higher surface area to volume ratio allows for more efficient exchange of gases, nutrients, and waste
• How does the surface area to volume ratio change as an object's size increases?

  It decreases
• What is the surface area to volume ratio a measure of?

  Surface area to volume
• A high surface area to volume ratio is advantageous for exchange surfaces in living organisms.

  True
• Arrange the following organisms in order from highest to lowest surface area to volume ratio:

  1️⃣ Single-celled organisms

  2️⃣ Larger organisms with specialized systems
• As an object's size increases, its surface area to volume ratio decreases
• Larger organisms develop specialized systems to enhance exchange efficiency due to a lower surface area to volume ratio.


  True
• Match the organism with its adaptation to optimize the surface area to volume ratio:

  Human lungs ↔️ Extensive branching

  Single-celled organisms ↔️ Thin, flattened structures
• What adaptation do plants use to maximize surface area for photosynthesis and gas exchange?

  Thin, broad leaves
• Adaptations to optimize the surface area to volume ratio allow organisms to maintain efficient exchange processes as they grow.


  True
• A higher surface area to volume ratio allows for more efficient exchange of materials like gases, nutrients, and waste
• The surface area to volume ratio is crucial for exchange processes in living organisms because it allows for more efficient exchange of gases, nutrients, and waste
• Single-celled organisms have a high surface area to volume ratio due to their specialized systems.

  False
• What happens to the surface area to volume ratio as an object grows in size?

  It decreases
• Single-celled organisms like amoebas and paramecia have a high surface area to volume ratio due to their thin, flattened shapes
• Insects use a tracheal system with many small tubes to increase the surface area for gas exchange
• Mammals have villi and microvilli in their intestines to expand the surface area for nutrient absorption