Podcast
Questions and Answers
What is the primary purpose of cellular respiration?
What is the primary purpose of cellular respiration?
- To eliminate carbon dioxide
- To generate ATP energy (correct)
- To produce sugars
- To exchange gases with the environment
Which factor is NOT required for efficient gas exchange across the plasma membrane?
Which factor is NOT required for efficient gas exchange across the plasma membrane?
- Greater concentration gradient of gases
- Moist environment
- Small surface area (correct)
- Thin and permeable membrane
How do gases move into and out of a cell across the plasma membrane?
How do gases move into and out of a cell across the plasma membrane?
- Via diffusion along a concentration gradient (correct)
- Through osmosis
- Via active transport
- By endocytosis and exocytosis
Why do some organisms exchange gases with both air and water?
Why do some organisms exchange gases with both air and water?
In which organisms is gas exchange most critical for survival?
In which organisms is gas exchange most critical for survival?
What is the primary respiratory mechanism used by higher forms of aquatic organisms?
What is the primary respiratory mechanism used by higher forms of aquatic organisms?
What structures are found in insects and most arthropods that are composed of systems of tubes known as tracheae?
What structures are found in insects and most arthropods that are composed of systems of tubes known as tracheae?
Why is cutaneous respiration problematic for larger organisms?
Why is cutaneous respiration problematic for larger organisms?
Which type of organisms can obtain oxygen from the environment through direct diffusion?
Which type of organisms can obtain oxygen from the environment through direct diffusion?
What is the function of spiracles in insect respiration?
What is the function of spiracles in insect respiration?
Why are air breathers more sensitive to changes in carbon dioxide concentration?
Why are air breathers more sensitive to changes in carbon dioxide concentration?
How do small organisms with simple gas exchange structures differ from larger organisms?
How do small organisms with simple gas exchange structures differ from larger organisms?
What is a challenge faced by single-celled organisms and lower forms of animals using cutaneous respiration?
What is a challenge faced by single-celled organisms and lower forms of animals using cutaneous respiration?
What distinguishes the gas exchange process in insects and most arthropods from that of vertebrates?
What distinguishes the gas exchange process in insects and most arthropods from that of vertebrates?
What factor drives ventilation in air breathers?
What factor drives ventilation in air breathers?
What is the main function of spiracles in insect respiration?
What is the main function of spiracles in insect respiration?
How do external gills primarily obtain oxygen in aquatic organisms?
How do external gills primarily obtain oxygen in aquatic organisms?
What is the significance of countercurrent flow in the exchange of gases in internal gills?
What is the significance of countercurrent flow in the exchange of gases in internal gills?
How does the buccal and opercular pump system contribute to fish respiration?
How does the buccal and opercular pump system contribute to fish respiration?
What distinguishes gas bladders from lungs in certain fish species?
What distinguishes gas bladders from lungs in certain fish species?
